I just come across your post by typing 'Lost cat in SE23' into Google and unfortunately this cat sounds just like mine (I live on Tatnell Rd).

My cat, Sim, was last seen on Monday 18 Oct and I've just been making posters and leaflets today in an effort to find him. I have attached a poster for you to look at - please would you let me know if you think the cat was Sim? I need to tell my two young children, but want to make sure first...

If you would like to contact me about this my number is 07963 345 221.

I really appreciate you posting this information - it was really kind of you. It's really upsetting, but it's better than not knowing....

Tania