On 03/05/2021 09:38, Jedzi wrote:

I've got an ancient, maybe 40 or 50 years old, switch for the immersion heater in my airing cupboard. It's a thin-ish one, mounted on the wooden door frame.

Increasingly, it gets hot in use and has started to smell slightly (I think it's a heated plastic type smell).

I want to replace it with a switch like this https://bit.ly/336ClVA , mounted in a steel back box, on the wall next to it. Am I allowed to do that?


IT will look silly on a metal backbox, they are intended to be sunk
into the wall. Just use a single surface-mount pattress box like
this -

https://www.screwfix.com/p/mk-1-gang...ite-30mm/11340