Hi Everyone.
Well we had some success. We managed to capture him in our conservatory, last night, by keeping the cat flap on 'in only'. When he came in at his usual time I got up from my chair and he heard me and tried to get out again. He did panic a bit and ripped the inner part of the catflap off the wall! but I managed to calm him down (wearing my thickest gardening gloves) and he let me stroke his head. Anyway, as soon as I saw him up close it was obvious that he wasn't a Burmese but a Siamese. A beautiful cat actually, but a very muscular and powerful entire male, no wonder my girls were terrified. He eventually sat down and I was able to read the tag on his harness. Luckily it had a local phone number and his owners name. I wrote down the details and then let him out.
I phoned the owner and told him what had been happening but he didn't seem at all interested. He didn't even say sorry
He said that he has an electronic catflap that locks at dusk so that his cat can't get out once he is in after dark and that he always comes back before bedtime and doesn't leave the house again until the next afternoon. Well, that is certainly not true, and I told him so, as I have photographs of him in my house at all hours of the night and first thing in the morning (from a field camera, normally used to photograph wildlife, which we set up in the conservatory). I also pointed out to him that it was irresponsible of him to let his cat roam when he hadn't been neutered and that it could possibly calm him and help to reduce his aggression, and he did say that he would see about getting that done. I won't hold my breath though.
He told me I should get an electronic catflap so that his cat couldn't get into my house. I pointed out to him that I already have one but my youngest girl is so timid she is even frightened of the click of the catflap unlocking so it is taking time to train her to use it on an inner door first, and besides, that won't stop him coming into the garden so she will still be wary of going outside.
He also said that he hadn't received any other complaints but, frankly, I don't believe him. I said that I would call him again if anything else occurs.
At least I now know that the cat isn't lost and lives just around the corner and I can contact the owner at any time. The saga continues