Mr Gromit de-lurking here... Gromit asleep shattered.
Nope, Billa's still stuck in their house. RSPCA busy with more urgent stuff on Sat night it seems - fair enough really. She looks OK through the letterbox, just meows piteously whenever anyone looks in. RSPCA suggested putting ice cubes through for her to lick so we've done a few of those and she seems to be wanting them, will do another shortly. Doesn't look obviously dehydrated or suffering, hard to tell of course just looking through the letterbox.
Also spoke to their neighbours and one of them reckons the owners are teachers, so what with term starting on Monday they're pretty much guaranteed to be back tomorrow. But we don't actually know that, so prob best let the RSPCA turn up and decide. We also both have to be working tomorrow which isn't ideal.
Have put a note up on their door explaining things in case they get back from hols tonight.
Hope she hasn't made much of a mess in their house - think we should probably offer to make it good one way or another. Our cat after all, and not as if they'd done it at all deliberately.
Cheers for all the support everyone :-)
Pete