Hi!

bicycle=use_sidepath shouldn't be used in England as we don't have compulsory cycleways (bicycles are allowed on public highways except "special roads" - mostly motorways: https://en.wikipedia.org/wiki/Special_road )  The Wiki article on use_sidepath says:-
"This tag should only be applied in countries that have compulsory cycleways."
https://wiki.openstreetmap.org/wiki/Tag:bicycle%3Duse_sidepath

Jon