Sorry to bore anyone with all this.
I just found a rescue-centre lady 20 miles away who will take him in if I can't keep him (and I could, if we could sort out the feeding, ie if twice a day is adequate)
While I've been talking to her on the phone, the bird has jumped from his box onto the table, then onto the keyboard ~ which was cute.
starling2 on Flickr - Photo Sharing!
He then scampered up onto my shoulder and pecked at my teeth

No way am I feeding him worms from my mouth

I guess he's imprinted now. Virtually a pet, now.