I am glad you spotted that two are neutered. In a way that makes it worse, in that they may both get dumped. I guessed it was an owner who cared for them, having got them neutered and then still holding on to them. My heart goes out to the owners, his family and obviously the poor cats.
I have posted it on FB as well. You never know where these cats will end up, it is a shame that micro chipping wasn't carried out. A cat could always escape, out of the pen, from a car in the event of an accident etcetera.
I do hope they find them soon. If you hear anything, would you please post on here?