In article ,
David wrote:
Following advice I am mounting (or trying to) single 13 amp sockets with a
flip lid into the floorboards.

I ordered Appleby dry lining boxes from Screwfix.

https://www.screwfix.com/p/appleby-1-gang-47mm-dry-lining-box/83270

Why on earth would you use dry lining boxes into floorboards? Screws
through the side of a metal box would be simpler and neater.

--
*Why do psychics have to ask you for your name? *

Dave Plowman London SW
To e-mail, change noise into sound.