On Wednesday, 5 February 2020 19:16:09 UTC, ARW wrote:

The switch I mentioned is

https://www.tlc-direct.co.uk/Products/EI1529RC.html?

Yes, I think I'm going to fit one under the stairs. The 'locate' feature sounds particularly useful. A house full of blaring smoke alarms doesn't half cause something of a panic, but then I guess that's what they're for!

PS I am chasing up what you need off me.

Thanks Adam! :-) (There's still no urgency as I'm still not finished!)