I'm sure he'll be fine Dawn
Cats have a habit of disappearing at the times when you need them around. The little white one that had been abandoned turned up out of the blue as he'd been awol for a few days as well, I'm keeping everything crossed that he's safe and well, xxxxx
Is your place of work open on a weekend? It might be worth going down there early evening and seeing if he turns up......I would leave a stash of food down for him just in case and then try the trap again if he appears