On Tuesday, 20 April 2021 at 14:23:52 UTC+1, Dave Plowman (News) wrote:

Never had a problem with a decent size box and leaving adequate length
tails. Some seem to think cable costs a fortune, so try and save every
inch.

A previous house, every cable was as short as possible. Almost impossible to replace a socket or switch if the positions were even slightly different. In fact, you could take the screws out and the socket or switch wouldn't move more than a fraction of a millimetre.