They’re probably scratching around now as they’re preparing to hibernate. They’ll be asleep soon.
You’re on pretty dodgy ground with any attempts to persuade them to leave, as you say it’s illegal to disturb them. Plus, to be honest, given that they are about about to hibernate it’s a pretty crappy time of the year to do it. At least wait until next Spring/Summer to give them a fighting chance of finding somewhere else.
We had them in our old loft, probably living under the tiles, and they were no problem bar the occasional scratchy sound and a mild smell of wee in the loft :-). I quite liked watching them fly around the garden at dusk.