{
 "name": "gassafetycertificatecost.co.uk Landlord Gas Safety Duty",
 "title": "Landlord Gas Safety Duty",
 "url": "https://gassafetycertificatecost.co.uk/datasets/landlord-gas-safety-duty/",
 "csv": "https://gassafetycertificatecost.co.uk/datasets/landlord-gas-safety-duty.csv",
 "markdown": "https://gassafetycertificatecost.co.uk/datasets/landlord-gas-safety-duty/index.md",
 "computed_at": "2026-10-28",
 "license": "https://gassafetycertificatecost.co.uk/terms",
 "headline": "The Landlord Gas Safety Duty carries 17 published figures read from 2 sources' own pages, from 2 to 7 year, read 24 October 2026.",
 "quotes": [
  "The Landlord Gas Safety Duty carries 17 published figures read from 2 sources' own pages, from 2 to 7 year, read 24 October 2026.",
  "3 of the 8 named sources read in full publish a figure; 5 publish none, read 24 October 2026."
 ],
 "citation": "\"gassafetycertificatecost.co.uk Landlord Gas Safety Duty\", updated 2026-10-28, https://gassafetycertificatecost.co.uk/datasets/landlord-gas-safety-duty/.",
 "changed_since": null,
 "national": {
  "unit": "year",
  "n": 2,
  "median": 7,
  "min": 7,
  "max": 7,
  "p25": null,
  "p75": null,
  "mean": 7,
  "units": {
   "day": 2,
   "month": 2,
   "year": 2
  },
  "published_sources": 3,
  "named_sources": 9,
  "read_sources": 8,
  "not_published": 5,
  "published_share": 0.375
 },
 "by_axis": {},
 "rows": [
  {
   "source": "The Gas Safety (Installation and Use) Regulations 1998",
   "url": "https://www.legislation.gov.uk/uksi/1998/2451/regulation/36/made",
   "figure": "7 years",
   "value": 7,
   "unit": "year",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "a lease for a term of less than 7 years; and",
   "source_class": "primary-government",
   "text_sha256": "ce3072a5cc0f32bba5b1d16af258b4a2de8bcd56c0f64a6084e9b90c45938147"
  },
  {
   "source": "The Gas Safety (Installation and Use) Regulations 1998",
   "url": "https://www.legislation.gov.uk/uksi/1998/2451/regulation/36/made",
   "figure": "7 years",
   "value": 7,
   "unit": "year",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "a lease for a term of less than 7 years; and a tenancy for a periodic term; and",
   "source_class": "primary-government",
   "text_sha256": "ce3072a5cc0f32bba5b1d16af258b4a2de8bcd56c0f64a6084e9b90c45938147"
  },
  {
   "source": "The Gas Safety (Installation and Use) Regulations 1998",
   "url": "https://www.legislation.gov.uk/uksi/1998/2451/regulation/36/made",
   "figure": "7 years",
   "value": 7,
   "unit": "year",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "a lease which is determinable at the option of the lessor before the expiration of 7 years from the commencement of the term shall be treated as a lease for a term of less than 7 years;",
   "source_class": "primary-government",
   "text_sha256": "ce3072a5cc0f32bba5b1d16af258b4a2de8bcd56c0f64a6084e9b90c45938147"
  },
  {
   "source": "The Gas Safety (Installation and Use) Regulations 1998",
   "url": "https://www.legislation.gov.uk/uksi/1998/2451/regulation/36/made",
   "figure": "7 years",
   "value": 7,
   "unit": "year",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "a lease (other than a lease to which sub-paragraph (b) above applies) shall not be treated as a lease for a term of less than 7 years if it confers on the lessee an option for renewal for a term which, together with the original term, amounts to 7 years or more; and",
   "source_class": "primary-government",
   "text_sha256": "ce3072a5cc0f32bba5b1d16af258b4a2de8bcd56c0f64a6084e9b90c45938147"
  },
  {
   "source": "The Gas Safety (Installation and Use) Regulations 1998",
   "url": "https://www.legislation.gov.uk/uksi/1998/2451/regulation/36/made",
   "figure": "7 years",
   "value": 7,
   "unit": "year",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "a lease (other than a lease to which sub-paragraph (b) above applies) shall not be treated as a lease for a term of less than 7 years if it confers on the lessee an option for renewal for a term which, together with the original term, amounts to 7 years or more; and a “lease” does not include a mortgage term;",
   "source_class": "primary-government",
   "text_sha256": "ce3072a5cc0f32bba5b1d16af258b4a2de8bcd56c0f64a6084e9b90c45938147"
  },
  {
   "source": "The Gas Safety (Installation and Use) Regulations 1998",
   "url": "https://www.legislation.gov.uk/uksi/1998/2451/regulation/36/made",
   "figure": "2 years",
   "value": 2,
   "unit": "year",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "ensure that a record in respect of any appliance or flue so checked is made and retained for a period of 2 years from the date of that check, which record shall include the following information—",
   "source_class": "primary-government",
   "text_sha256": "ce3072a5cc0f32bba5b1d16af258b4a2de8bcd56c0f64a6084e9b90c45938147"
  },
  {
   "source": "The Gas Safety (Installation and Use) Regulations 1998",
   "url": "https://www.legislation.gov.uk/uksi/1998/2451/regulation/36/made",
   "figure": "2 years",
   "value": 2,
   "unit": "year",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "ensure that a record in respect of any appliance or flue so checked is made and retained for a period of 2 years from the date of that check, which record shall include the following information— the date on which the appliance or flue was checked;",
   "source_class": "primary-government",
   "text_sha256": "ce3072a5cc0f32bba5b1d16af258b4a2de8bcd56c0f64a6084e9b90c45938147"
  },
  {
   "source": "The Gas Safety (Installation and Use) Regulations 1998",
   "url": "https://www.legislation.gov.uk/uksi/1998/2451/regulation/36/made",
   "figure": "28 days",
   "value": 28,
   "unit": "day",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "a copy of the record made pursuant to the requirements of paragraph (3)(c) above is given to each existing tenant of premises to which the record relates within 28 days of the date of the check; and",
   "source_class": "primary-government",
   "text_sha256": "ce3072a5cc0f32bba5b1d16af258b4a2de8bcd56c0f64a6084e9b90c45938147"
  },
  {
   "source": "The Gas Safety (Installation and Use) Regulations 1998",
   "url": "https://www.legislation.gov.uk/uksi/1998/2451/regulation/36/made",
   "figure": "28 days",
   "value": 28,
   "unit": "day",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "a copy of the last record made in respect of each appliance or flue is given to any new tenant of premises to which the record relates before that tenant occupies those premises save that, in respect of a tenant whose right to occupy those premises is for a period not exceeding 28 days, a copy of the record may instead be prominently displayed within those premises.",
   "source_class": "primary-government",
   "text_sha256": "ce3072a5cc0f32bba5b1d16af258b4a2de8bcd56c0f64a6084e9b90c45938147"
  },
  {
   "source": "The Gas Safety (Installation and Use) Regulations 1998",
   "url": "https://www.legislation.gov.uk/uksi/1998/2451/regulation/36/made",
   "figure": "28 days",
   "value": 28,
   "unit": "day",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "a copy of the last record made in respect of each appliance or flue is given to any new tenant of premises to which the record relates before that tenant occupies those premises save that, in respect of a tenant whose right to occupy those premises is for a period not exceeding 28 days, a copy of the record may instead be prominently displayed within those premises. (9) A safety check carried out",
   "source_class": "primary-government",
   "text_sha256": "ce3072a5cc0f32bba5b1d16af258b4a2de8bcd56c0f64a6084e9b90c45938147"
  },
  {
   "source": "The Gas Safety (Installation and Use) Regulations 1998",
   "url": "https://www.legislation.gov.uk/uksi/1998/2451/regulation/36/made",
   "figure": "12 months",
   "value": 12,
   "unit": "month",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "ds has been checked for safety within a period of 12 months before the lease commences or has been or is so checked within 12 months after the appliance or flue has been installed, whichever is later; and ensure that a record in respect of any appliance or flue so checked is made and retained for a period of 2 years from the date of that check, which record shall include the following information—",
   "source_class": "primary-government",
   "text_sha256": "ce3072a5cc0f32bba5b1d16af258b4a2de8bcd56c0f64a6084e9b90c45938147"
  },
  {
   "source": "The Gas Safety (Installation and Use) Regulations 1998",
   "url": "https://www.legislation.gov.uk/uksi/1998/2451/regulation/36/made",
   "figure": "12 months",
   "value": 12,
   "unit": "month",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "months before the lease commences or has been or is so checked within 12 months after the appliance or flue has been installed, whichever is later; and ensure that a record in respect of any appliance or flue so checked is made and retained for a period of 2 years from the date of that check, which record shall include the following information— the date on which the appliance or flue was checked;",
   "source_class": "primary-government",
   "text_sha256": "ce3072a5cc0f32bba5b1d16af258b4a2de8bcd56c0f64a6084e9b90c45938147"
  },
  {
   "source": "Gas safety - landlords and letting agents - HSE",
   "url": "https://www.hse.gov.uk/gas/domestic/faqlandlord.htm",
   "figure": "7 years",
   "value": 7,
   "unit": "year",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "In relation to domestic gas under the Gas Safety (Installation and Use) Regulations 1998 (GS(IU)R 98), a landlord is anyone who rents out a property that they own under a lease that is shorter than 7 years or under a licence .",
   "source_class": "primary-government",
   "text_sha256": "06915f0e54d3589bbb05e1506291e1f429f461e05b773fcb7374c1f9febeb86d"
  },
  {
   "source": "Gas safety - landlords and letting agents - HSE",
   "url": "https://www.hse.gov.uk/gas/domestic/faqlandlord.htm",
   "figure": "7 years",
   "value": 7,
   "unit": "year",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "In relation to domestic gas under the Gas Safety (Installation and Use) Regulations 1998 (GS(IU)R 98), a landlord is anyone who rents out a property that they own under a lease that is shorter than 7 years or under a licence . Regardless of whether you are a landlord under GS(IU)R 98 you may be considered a landlord under other related legislation.",
   "source_class": "primary-government",
   "text_sha256": "06915f0e54d3589bbb05e1506291e1f429f461e05b773fcb7374c1f9febeb86d"
  },
  {
   "source": "Gas safety - landlords and letting agents - HSE",
   "url": "https://www.hse.gov.uk/gas/domestic/faqlandlord.htm",
   "figure": "seven years",
   "value": 7,
   "unit": "year",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "If the lease is for longer than seven years and is for life, the landlord is not responsible for gas safety checks and maintenance.",
   "source_class": "primary-government",
   "text_sha256": "06915f0e54d3589bbb05e1506291e1f429f461e05b773fcb7374c1f9febeb86d"
  },
  {
   "source": "Gas safety - landlords and letting agents - HSE",
   "url": "https://www.hse.gov.uk/gas/domestic/faqlandlord.htm",
   "figure": "seven years",
   "value": 7,
   "unit": "year",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "If the lease is for longer than seven years and is for life, the landlord is not responsible for gas safety checks and maintenance. But if there is an implied tenancy arrangement, such as accommodation is provided as part of your job (eg vicar, publican), you should continue to carry out your duties for maintenance and gas safety checks.",
   "source_class": "primary-government",
   "text_sha256": "06915f0e54d3589bbb05e1506291e1f429f461e05b773fcb7374c1f9febeb86d"
  },
  {
   "source": "Gas safety - landlords and letting agents - HSE",
   "url": "https://www.hse.gov.uk/gas/domestic/faqlandlord.htm",
   "figure": "7 years",
   "value": 7,
   "unit": "year",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "If you have shared ownership of your property and the lease is for longer than 7 years the housing company does not have landlord's duties under the Gas Safety (Installation and Use) Regulations 1998 (GS(IU)R 98).",
   "source_class": "primary-government",
   "text_sha256": "06915f0e54d3589bbb05e1506291e1f429f461e05b773fcb7374c1f9febeb86d"
  },
  {
   "source": "Gas safety - landlords and letting agents - HSE",
   "url": "https://www.hse.gov.uk/gas/domestic/faqlandlord.htm",
   "figure": "7 years",
   "value": 7,
   "unit": "year",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "If you have shared ownership of your property and the lease is for longer than 7 years the housing company does not have landlord's duties under the Gas Safety (Installation and Use) Regulations 1998 (GS(IU)R 98). In this situation you would have the same responsibilities as a",
   "source_class": "primary-government",
   "text_sha256": "06915f0e54d3589bbb05e1506291e1f429f461e05b773fcb7374c1f9febeb86d"
  },
  {
   "source": "Gas safety - landlords and letting agents - HSE",
   "url": "https://www.hse.gov.uk/gas/domestic/faqlandlord.htm",
   "figure": "7 years",
   "value": 7,
   "unit": "year",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "In situations where a lease is shorter than 7 years then the housing company would be classified as a landlord under GS(IU)R 98.",
   "source_class": "primary-government",
   "text_sha256": "06915f0e54d3589bbb05e1506291e1f429f461e05b773fcb7374c1f9febeb86d"
  },
  {
   "source": "Gas safety - landlords and letting agents - HSE",
   "url": "https://www.hse.gov.uk/gas/domestic/faqlandlord.htm",
   "figure": "7 years",
   "value": 7,
   "unit": "year",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "In situations where a lease is shorter than 7 years then the housing company would be classified as a landlord under GS(IU)R 98. The contract between you and the housing company should clearly state who is responsible for the associated duties for domestic gas safety.",
   "source_class": "primary-government",
   "text_sha256": "06915f0e54d3589bbb05e1506291e1f429f461e05b773fcb7374c1f9febeb86d"
  },
  {
   "source": "Gas safety - landlords and letting agents - HSE",
   "url": "https://www.hse.gov.uk/gas/domestic/faqlandlord.htm",
   "figure": "12 months",
   "value": 12,
   "unit": "month",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "You are also responsible for ensuring an annual gas safety check is carried out within 12 months of the installation of a new appliance or flue which you provide and annually thereafter by a Gas Safe Registered engineer.",
   "source_class": "primary-government",
   "text_sha256": "06915f0e54d3589bbb05e1506291e1f429f461e05b773fcb7374c1f9febeb86d"
  },
  {
   "source": "Gas safety - landlords and letting agents - HSE",
   "url": "https://www.hse.gov.uk/gas/domestic/faqlandlord.htm",
   "figure": "2 years",
   "value": 2,
   "unit": "year",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "You must keep a record of the safety check for 2 years and issue a copy to each existing tenant within 28 days of the check being completed and issue a copy to any new tenants before they move in.",
   "source_class": "primary-government",
   "text_sha256": "06915f0e54d3589bbb05e1506291e1f429f461e05b773fcb7374c1f9febeb86d"
  },
  {
   "source": "Gas safety - landlords and letting agents - HSE",
   "url": "https://www.hse.gov.uk/gas/domestic/faqlandlord.htm",
   "figure": "2 months",
   "value": 2,
   "unit": "month",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "Under the Gas Safety (Installation and Use) (Amendment) Regulations 2018 you can have the annual gas safety check on each appliance or flue carried out up to 2 months before the date the check needs to be carried out but still retain the original deadline date as if the check had been carried out exactly 12 months after the previous check.",
   "source_class": "primary-government",
   "text_sha256": "06915f0e54d3589bbb05e1506291e1f429f461e05b773fcb7374c1f9febeb86d"
  },
  {
   "source": "Gas safety - landlords and letting agents - HSE",
   "url": "https://www.hse.gov.uk/gas/domestic/faqlandlord.htm",
   "figure": "2 months",
   "value": 2,
   "unit": "month",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "Under the Gas Safety (Installation and Use) (Amendment) Regulations 2018 you can have the annual gas safety check on each appliance or flue carried out up to 2 months before the date the check needs to be carried out but still retain the original deadline date as if the check had been carried out exactly 12 months after the previous check. For more information see",
   "source_class": "primary-government",
   "text_sha256": "06915f0e54d3589bbb05e1506291e1f429f461e05b773fcb7374c1f9febeb86d"
  },
  {
   "source": "Gas safety - landlords and letting agents - HSE",
   "url": "https://www.hse.gov.uk/gas/domestic/faqlandlord.htm",
   "figure": "12 months",
   "value": 12,
   "unit": "month",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "You must also arrange for an annual gas safety check to be carried out every 12 months by a",
   "source_class": "primary-government",
   "text_sha256": "06915f0e54d3589bbb05e1506291e1f429f461e05b773fcb7374c1f9febeb86d"
  },
  {
   "source": "Gas safety - landlords and letting agents - HSE",
   "url": "https://www.hse.gov.uk/gas/domestic/faqlandlord.htm",
   "figure": "12 months",
   "value": 12,
   "unit": "month",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "You must also arrange for an annual gas safety check to be carried out every 12 months by a Gas Safe registered",
   "source_class": "primary-government",
   "text_sha256": "06915f0e54d3589bbb05e1506291e1f429f461e05b773fcb7374c1f9febeb86d"
  },
  {
   "source": "Gas safety - landlords and letting agents - HSE",
   "url": "https://www.hse.gov.uk/gas/domestic/faqlandlord.htm",
   "figure": "2 years",
   "value": 2,
   "unit": "year",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-09-11",
   "quote": "You must keep a record of the safety check for 2 years and issue a copy to each existing tenant within 28 days of the check being completed and issue a copy to any new tenants before they move in. What gas appliances do I have responsibilities for?",
   "source_class": "primary-government",
   "text_sha256": "06915f0e54d3589bbb05e1506291e1f429f461e05b773fcb7374c1f9febeb86d"
  },
  {
   "source": "Private renting: Your landlord's safety responsibilities - GOV.UK",
   "url": "https://www.gov.uk/private-renting/your-landlords-safety-responsibilities",
   "figure": "28 days",
   "value": 28,
   "unit": "day",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-10-24",
   "quote": "give you a copy of the gas safety check record before you move in, or within 28 days of the check",
   "source_class": "primary-government",
   "text_sha256": "494906ce8703d5fe489d99628a61972821bde085d2a450b6857c65162116a6fc"
  },
  {
   "source": "Private renting: Your landlord's safety responsibilities - GOV.UK",
   "url": "https://www.gov.uk/private-renting/your-landlords-safety-responsibilities",
   "figure": "28 days",
   "value": 28,
   "unit": "day",
   "vat": null,
   "axis": {},
   "retrieved_at": "2026-10-24",
   "quote": "give you a copy of the gas safety check record before you move in, or within 28 days of the check Electrical safety",
   "source_class": "primary-government",
   "text_sha256": "494906ce8703d5fe489d99628a61972821bde085d2a450b6857c65162116a6fc"
  }
 ],
 "not_published": [
  {
   "source": "The Gas Safety (Installation and Use) Regulations 1998",
   "url": "https://www.legislation.gov.uk/uksi/1998/2451/contents/made",
   "retrieved_at": "2026-09-11",
   "reason": "read in full and no accepted figure on the page"
  },
  {
   "source": "Landlords' responsibility for gas safety - HSE",
   "url": "https://www.hse.gov.uk/gas/landlords/index.htm",
   "retrieved_at": "2026-10-24",
   "reason": "read in full and no accepted figure on the page"
  },
  {
   "source": "Check an engineer - are they Gas Safe registered? - HSE",
   "url": "https://www.hse.gov.uk/gas/gas-safe-register-check.htm",
   "retrieved_at": "2026-09-11",
   "reason": "read in full and no accepted figure on the page"
  },
  {
   "source": "Repairing Standard: statutory guidance for private landlords - gov.scot",
   "url": "https://www.gov.scot/publications/repairing-standard-statutory-guidance-private-landlords/",
   "retrieved_at": "2026-10-24",
   "reason": "read in full and no accepted figure on the page"
  },
  {
   "source": "Landlords - HSE",
   "url": "https://www.hse.gov.uk/pubns/indg285.htm",
   "retrieved_at": "2026-10-24",
   "reason": "read in full and no accepted figure on the page"
  }
 ],
 "sources": [
  {
   "url": "https://www.legislation.gov.uk/uksi/1998/2451/contents/made",
   "label": "The Gas Safety (Installation and Use) Regulations 1998",
   "license": "the publisher's own terms; quoted for reporting and comment"
  },
  {
   "url": "https://www.hse.gov.uk/gas/domestic/faqlandlord.htm",
   "label": "Gas safety - landlords and letting agents - HSE",
   "license": "the publisher's own terms; quoted for reporting and comment"
  },
  {
   "url": "https://www.hse.gov.uk/gas/landlords/index.htm",
   "label": "Landlords' responsibility for gas safety - HSE",
   "license": "the publisher's own terms; quoted for reporting and comment"
  },
  {
   "url": "https://www.legislation.gov.uk/uksi/1998/2451/regulation/36/made",
   "label": "The Gas Safety (Installation and Use) Regulations 1998",
   "license": "the publisher's own terms; quoted for reporting and comment"
  },
  {
   "url": "https://www.hse.gov.uk/gas/gas-safe-register-check.htm",
   "label": "Check an engineer - are they Gas Safe registered? - HSE",
   "license": "the publisher's own terms; quoted for reporting and comment"
  },
  {
   "url": "https://www.gov.uk/private-renting/your-landlords-safety-responsibilities",
   "label": "Private renting: Your landlord's safety responsibilities - GOV.UK",
   "license": "the publisher's own terms; quoted for reporting and comment"
  },
  {
   "url": "https://www.gov.scot/publications/repairing-standard-statutory-guidance-private-landlords/",
   "label": "Repairing Standard: statutory guidance for private landlords - gov.scot",
   "license": "the publisher's own terms; quoted for reporting and comment"
  },
  {
   "url": "https://www.gassaferegister.co.uk/help-and-advice/gas-safety-in-the-home/landlords/",
   "label": "gassaferegister.co.uk",
   "license": "the publisher's own terms; quoted for reporting and comment"
  },
  {
   "url": "https://www.hse.gov.uk/pubns/indg285.htm",
   "label": "Landlords - HSE",
   "license": "the publisher's own terms; quoted for reporting and comment"
  }
 ],
 "methodology": "Every row is a verbatim sentence read from the named source's own page through our fetch service on the date shown, hash-pinned to the stored read (the sha of the page's visible text; the raw page is mirrored to R2). 3 of the 8 named sources that could be read published a usable figure; 5 published none and are recorded as not published, never filled in; 1 could not be read (blocked, dead or unreachable) and count nowhere. The headline figures (median, minimum, maximum, quartiles) are over ONE figure per source in year (a source's median where its page yielded several accepted sentences), so N counts sources, never sentences; 0 candidate sentence(s) were refused by a reviewer with the reason recorded. The fuller derivation this dataset is chartered to grow into (not yet what the figures above are; they are each source's own published figure as read): one row per duty with its source and date: the annual safety check (within 12 months of the last), the record and what it must contain, the copy to the tenant within 28 days and to a new tenant before they move in, the two-year retention, who may do the check (a Gas Safe registered engineer), and the Northern Ireland and Scotland equivalents; the side-by-side is what no single authority publishes.",
 "embed": "<figure style=\"margin:0;padding:16px;border:1px solid #d9d9d9;border-radius:8px;background:#ffffff;color:#111111;font-family:system-ui,sans-serif;max-width:480px\"><p style=\"margin:0 0 8px;font-size:28px;font-weight:700;color:#111111;background:#ffffff\">2 to 7 year</p><p style=\"margin:0 0 8px;font-size:14px;color:#111111;background:#ffffff\">2 published figures, Landlord Gas Safety Duty, across 2 sources, read 24 October 2026</p><figcaption style=\"font-size:12px;color:#444444;background:#ffffff\"><a href=\"https://gassafetycertificatecost.co.uk/datasets/landlord-gas-safety-duty/#median\" style=\"color:#1a4fd6;background:#ffffff\">Source: gassafetycertificatecost.co.uk Landlord Gas Safety Duty</a></figcaption></figure>"
}
