Good news (I hope) - it looks like either the owners have found their ginger tom cat, or started looking after him again!

He still comes to visit, but is not anywhere near as hungry (I have stopped feeding him now) and is no longer sleeping on my garden furniture. Instead, he now wears a collar that says "I'm chipped" (he definitely didn't have a chip when I took him to the vet, so hopefully has now been chipped and treated) since the weekend and appears to be going somewhere at the end of his roaming day. Yay! Hope he's got a good home and the owners are happy to have him, he's a lovely cat and deserves to be treated well.