| Gas Act 1986 | 1986 c. 44 | Act | applied | Gas Act 1995 | 1995 c. 45 | s. 17(2) | Yes | |
| Gas Act 1986 | 1986 c. 44 | Act | | The Utilities Act 2000 (Commencement No. 4 and Transitional Provisions) Order 2000 | 2000 No. 3343 | arts. 12 - 14 | Yes | |
| Gas Act 1986 | 1986 c. 44 | Act | transfer of functions | Consumers, Estate Agents and Redress Act 2007 | 2007 c. 17 | s. 30(3)(a) | Yes | |
| Gas Act 1986 | 1986 c. 44 | Act | power to apply (with modifications) conferred | Energy Act 2023 | 2023 c. 52 | s. 155(1) | Yes | |
| Gas Act 1986 | 1986 c. 44 | Act | power to amend conferred | Energy Act 2023 | 2023 c. 52 | s. 155(2) | Yes | |
| Gas Act 1986 | 1986 c. 44 | Act | power to amend conferred | Digital Markets, Competition and Consumers Act 2024 | 2024 c. 13 | s. 138(2)-(7) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 41E heading | word substituted | Enterprise and Regulatory Reform Act 2013 | 2013 c. 24 | Sch. 6 para. 24(4) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 41I heading | words substituted | The Public Bodies (Abolition of the National Consumer Council and Transfer of the Office of Fair Trading’s Functions in relation to Estate Agents etc) Order 2014 | 2014 No. 631 | Sch. 1 para. 4(18)(a) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 41I heading | words substituted | The Consumer Scotland Act 2020 (Consequential Provisions and Modifications) Order 2022 | 2022 No. 34 | Sch. para. 2(17)(a) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 23B-23G and cross-heading | inserted | The Electricity and Gas (Internal Markets) Regulations 2011 | 2011 No. 2704 | reg. 41(7) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 23B heading | word substituted | Enterprise and Regulatory Reform Act 2013 | 2013 c. 24 | Sch. 6 para. 16(4) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 23C heading | word substituted | Enterprise and Regulatory Reform Act 2013 | 2013 c. 24 | Sch. 6 para. 17(5) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 23D heading | word substituted | Enterprise and Regulatory Reform Act 2013 | 2013 c. 24 | Sch. 6 para. 18(3) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 23E heading | word substituted | Enterprise and Regulatory Reform Act 2013 | 2013 c. 24 | Sch. 6 para. 19(6) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 23F heading | word substituted | Enterprise and Regulatory Reform Act 2013 | 2013 c. 24 | Sch. 6 para. 20(3) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 23G heading | word substituted | Enterprise and Regulatory Reform Act 2013 | 2013 c. 24 | Sch. 6 para. 21(5) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 27B-27D and cross-heading. | inserted | The Gas and Electricity (Dispute Resolution) Regulations 2009 | 2009 No. 1349 | reg. 2 | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 27B cross-heading | words substituted | The Electricity and Gas (Internal Markets) Regulations 2011 | 2011 No. 2704 | reg. 28(2)(a) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 27B cross-heading | words substituted | The Electricity and Gas etc. (Amendment etc.) (EU Exit) Regulations 2019 | 2019 No. 530 | reg. 30 | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 27B heading | words substituted | The Electricity and Gas etc. (Amendment etc.) (EU Exit) Regulations 2019 | 2019 No. 530 | reg. 31(2) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 11A-11C and cross-heading | inserted | The Electricity and Gas (Internal Markets) Regulations 2011 | 2011 No. 2704 | reg. 7(2) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 8C-8Q and cross-heading | inserted | The Electricity and Gas (Internal Markets) Regulations 2011 | 2011 No. 2704 | reg. 4 | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 8E heading | words substituted | The Electricity and Gas etc. (Amendment etc.) (EU Exit) Regulations 2019 | 2019 No. 530 | reg. 13(2) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 8J heading | words substituted | The Electricity and Gas etc. (Amendment etc.) (EU Exit) Regulations 2019 | 2019 No. 530 | reg. 17(2) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 8M heading | words substituted | The Electricity and Gas etc. (Amendment etc.) (EU Exit) Regulations 2019 | 2019 No. 530 | reg. 19(2) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 23 heading and s. 23(1)-(4A) | substituted for s. 23 heading and s. 23(1)-(4) | The Electricity and Gas (Internal Markets) Regulations 2011 | 2011 No. 2704 | reg. 41(3) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 28 cross-heading | substituted | The Electricity and Gas (Internal Markets) Regulations 2011 | 2011 No. 2704 | reg. 37(3) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 8R 8S and cross-heading | inserted | The Electricity and Gas (Internal Markets) Regulations 2011 | 2011 No. 2704 | reg. 6 | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 19 cross-heading | substituted | The Electricity and Gas (Internal Markets) Regulations 2011 | 2011 No. 2704 | reg. 8(1) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 19AA heading | words omitted | The Electricity and Gas etc. (Amendment etc.) (EU Exit) Regulations 2019 | 2019 No. 530 | reg. 25(2) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 19CA heading | words omitted | The Electricity and Gas etc. (Amendment etc.) (EU Exit) Regulations 2019 | 2019 No. 530 | reg. 27(2) | Yes | |
| Gas Act 1986 | 1986 c. 44 | Pt. 2 | | The Electricity and Gas (Energy Efficiency Obligations) Order 2001 | 2001 No. 4011 | art. 12(1)(b) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 1-49 (Pt. 1) (defn. of "gas supplier") | applied | Greater Nottingham Light Rapid Transit Act 1994 | 1994 c. xv | s. 2(1) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 1-48 (Pt. 1) (defn. of "public gas supplier") | applied | The Bowes Extension Light Railway Order 1994 | 1994 No. 691 | s. 9 | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 1-48 (Pt. 1) (defn. of "public gas supplier") | applied | The Lydney and Parkend Light Railway (Extension and Amendment) Order 1994 | 1994 No. 1331 | art. 11 | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 1-48 (Pt. 1) (defn. of "public gas supplier") | applied | British Waterways Act 1995 | 1995 c. i | s. 3(1) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 1-48 (Pt. 1) | applied (prosp.) | Gas Act 1995 | 1995 c. 45 | s. 6(7) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 1-48 (Pt. 1) (defn. of "public gas transporter") | applied (1.3.1996) | Gas Act 1995 | 1995 c. 45 | s. 12(6) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 1-48 (Pt. 1) | applied (prosp.) | Gas Act 1995 | 1995 c. 45 | s. 16(1) Sch. 4 para. 1 | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 1-48 (Pt. 1) (defns. of "gas" and "public gas transporter") | applied (prosp.) | Gas Act 1995 | 1995 c. 45 | s. 16(1) Sch. 4 para. 4(4) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 1-48 (Pt. 1) (defn. of "gas undertakers") | applied (prosp.) | Gas Act 1995 | 1995 c. 45 | s. 16(1) Sch. 4 para. 12(amending1980 c 45Sch. 4 s. 36 proviso para. ([c])) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 1-48 (Pt. 1) (defn. of "gas supplier") | applied (prosp.) | Gas Act 1995 | 1995 c. 45 | s. 16(1) Sch. 4 para. 14(1)(subst.1986 c 45 s 233(3)(a)) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 1-48 (Pt. 1) (defn. of "gas supplier") | applied (prosp.) | Gas Act 1995 | 1995 c. 45 | s. 16(1) Sch. 4 para. 14(3)(subst.1986 c 45 s 372(4)(a)) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 1-48 (Pt. 1) (defn. of "public gas transporter") | applied (prosp.) | Gas Act 1995 | 1995 c. 45 | s. 16(1) Sch. 4 para. 11(1)(am.1976 c 76 s 9(1)) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 1-48 (Pt. 1) (defns. of "public gas transporter" and "service pipe") | applied (prosp.) | Gas Act 1995 | 1995 c. 45 | s. 16(1) Sch. 4 para. 6(2)(adding1962 c 58 s 58A 58B) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 1-48 (Pt. 1) (defns. of "public gas transporter" "gas supplier" and "gas shipper") | applied (prosp.) | Gas Act 1995 | 1995 c. 45 | s. 16(1) Sch. 4 para. 5(4)(b)(replacingthedefn.of"publicgassupplier" in 1954 c 21 s 3) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 1-48 (Pt. 1) (defn. of "public gas supplier") | applied | Channel Tunnel Rail Link Act 1996 | 1996 c. 61 | s. 52 Sch. 15 Pt. 2 para. 1(2) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 1-48 (Pt. 1) (defn. of "public gas transporter") | applied | Town and Country Planning (Scotland) Act 1997 | 1997 c. 8 | s. 277(1) | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 1 - 3 | | Utilities Act 2000 | 2000 c. 27 | Sch. 8 | Yes | |
| Gas Act 1986 | 1986 c. 44 | s. 4 | substituted (prosp.) | Gas Act 1995 | 1995 c. 45 | s. 1 | Yes | |