Originally Posted by
Dippy
I've only just decided to start using this forum regularly hence my late post.
I'm doing a lot of electrics in my own house so I have studied the Part P regs quite a lot. My advice is as follows:
1) Part P guidance is indeed guidance. IIRC the law (the relevant SI) doesn't mention heating. The only real way to confirm this is to ask the LABC.
2) Regarding notification, the other bits of part P contrast "new" with "replacement". Part P was also conceived primarily to avoid accidents caused by DIY work. Therefore the best interpretation is your no. 2