In other good news, mouse has been found, captured (alive) and released back into the wood
Lots of clattering at 1am...
Came downstairs and Smudger had brought a mouse in.
Spent the next hour playing 'catch the mouse' all around the living room. Finally managed to drop a plastic measuring jug over it while it was staring into my new torch.
Slid some card under the jug and released it outside unharmed... 
Half expected a neighbour to walk past as I stood on the driveway naked or an owl to swoop down and take the mouse away - or worse! 

and

for Mr/Ms Mouse
2am Pippi brings in a mouse and it hides under a unit. After an hour of defying the cats and trying to entice it out we gave up shutting the doors and leaving safe traps. Has it been trapped? Not as I type.
Cats are of course right now blissfully asleep on the bed as if butter wouldn't melt.
Thinks again about that £500 AI cat flap that recognises if bringing in wildlife and blocks it.