Liz, I would recommend listing "mgaic" on the following websites along with pictures:
http://www.animalsearchuk.co.uk/found_a_pet.php - this is used by vets in Stafford
http://www.lostmycat.org/
http://www.nationalpetregister.org/
http://mymoggy.com/
The following is also advice from battersea dogs home on what to do with a found cat:
"What to do if you have found a stray cat
Please read the following advice if you think you have found a stray cat:
Avoid feeding cats that come into your garden unless they are clearly underweight
Cats roam over wide areas so ask your neighbours to see if they know who the cat belongs to
Put a paper collar on the cat asking an owner to contact you if it is their cat.
If the cat is approachable, take it to your local vet who will be able to scan it for a microchip
If you haven’t found an owner within a couple of weeks try and rehome the cat through your local rescue centre
If you decide to keep the cat make sure you consider the commitment and responsibly of owning a pet."
unneutered male cats can walk MILES in search of a female. he could have come from anywhere in Stafford not just a few streets over. I'm glad he has found some lovely people to look after him, but a week is a short time for an unneutered male to be missing from his own home and there may yet be a family looking for him. When I took in a male cat last year we left him (without feeding him) for 3 months in the garden before fostering him - there are plenty of wild animals for cats to eat and he was rather rotund from catching mice when we eventually gave up the search for his own family. He's now living with my parents but his "found cat" listing is still up on the websites. If we ever did find his family we'd be sad to see him go but glad he was reunited with them.
I am slightly concerned on how fast you have moved on this but at least he is with loving caring people. it could be a lot worse for him!