I've been with a new band since August and rehearsed every week so far. They want to continue next week, with the studio having the same point of view as above - if you are 'musicians' practising for a recording or gig in the future, it's all OK. That said, we're very much not going to be doing paid gigs or releasing albums that I can ever see.
I'm on the fence as to if it is legal, or worth the potential ballache should anything pop up.