Hi,
No, no cat flap, so the front door must have been left open for him to wander into.
Since posting the first post, we've been to the school where her child is registered (as it's literally up the road), and someone has very kindly left a message on her mobile (which was switched off
) saying our cat is trapped in their house, and if need be the police will break in, however we'd like to try avoid that!
I agree with you that it should be seen as their responsibility that he's in their house, as the front door must have been left open long enough for him to wander in.
We've been to the door and he's clearly learnt how to open a door as the living room door was closed last night, however this morning it was open, so hopefully he would at least had somewhere comfortable to sleep!
Its just a waiting game now ... and I hate waiting!!!