

He said it was pale, furry like a cat, had a big white tail, small head and moved like a squirrel and wasn't even bothered when he shone a torch on it (no pics

It was going to some of the ground feeders in the bird garden then darted round to the back garden like the fox does and exited through the hedge.
I'll be on the lookout tonight.
Edit 15.35: Looking at pics online he reckons that it was more like a weasel or stoat but the coat looked longer than in most of the photos - it was completely white.