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Jurisdiction(s):
United Kingdom
Related legal acts
Key definition
Brexit definition

What does Brexit mean? Brexit is the practical shorthand in legal drafting and advice for the United Kingdom’s withdrawal from the European Union and the legal, regulatory and trading changes flowing from it. It covers the UK’s cessation of EU membership on exit day (31 January 2020) and the cessation of the EEA Agreement’s application, the end of the implementation/transition period on IP completion day (31 December 2020), and the commencement, expiry or variation of post‑withdrawal trading and regulatory arrangements, including the UK‑EU Trade and Cooperation Agreement, the Windsor Framework (amending the Northern Ireland Protocol), and UK agreements with third countries...

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R22 (HCFC) prohibition: UK (GB and Northern Ireland) legal regimes, enforcement, F-gas overlap and property transaction implications

Practice notes
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What is R22 gas?

R22 (chlorodifluoromethane) is a refrigerant categorised as a hydrochlorofluorocarbon (HCFC), which is an ozone-depleting substance (ODS). ODS harm the ozone layer that shields life on earth from harmful UV radiation. The main ODS groups are:

  • Chlorofluorocarbons (CFCs) – compounds such as R12 are the most damaging ODS and were banned in the 1990s.
  • Halons – chiefly used in fire protection systems and retained only for essential purposes like extinguishing aircraft fires; these applications will cease when alternatives are available.
  • Hydrochlorofluorocarbons (HCFCs) – the largest remaining use of ODS, mainly in refrigeration and air conditioning; R22 is an HCFC.

R22 was developed to replace CFCs due to its lower ozone depletion potential, yet it remains a powerful greenhouse gas with a global warming potential 1,800 times that of carbon dioxide.

Sectors affected

R22 was commonly used as an air conditioning refrigerant. The sectors at greatest risk are:

  • food and drink
  • retail
  • hospitality
  • pharmaceuticals
  • petro-chemicals

Legislation phasing out the use of R22

Montreal Protocol — The Montreal Protocol is an international...

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Web page updated on 21/05/2026

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