BS7671 Amendment 2 is incorporated into the 18th Edition of the IET Wiring Regulations which was updated in 2022 and is known as BS 7671:2018+A2:2022 Requirements for Electrical Installations.
The current version (at time of writing) of BS 7671 2018 includes:
- Corrigendum 2018
- Amendment 1 2020
- Corrigendum 2020
- Amendment 2 2022
And is coloured brown, some refer to it as the BBB (Big Brown Book).
UPDATE May 2023:-
BS 7671 Corrigendum 2023
In May 2023 the IET released another Corrigendum to BS 7671 18th Edition. A statement from the IET says;
BS 7671:2018+A1:2020 has been withdrawn for over six months now and it could be said that the effects of BS 7671:2018+A2:2022 are now bedding in and we have started to receive feedback about some of the changes.
All British Standards are subject to review at least every five years. The outcome of the review will result in the standard either being confirmed for continued use, withdrawn or updated.
Information is received daily and sometimes it is necessary to make changes before the next planned Amendment to BS 7671.
– Source: IET
You can view the May Corrigendum here BS 7671 Corrigendum 2023