Actually the only BA Fashion which didn't go into clearing last year was Kingston, which I believe your son has right @Duchessofmuchness? I was so surprised to see everywhere else popping up on the clearing lists last year, I'm sure CSM was too, LCF definitely was!
I'm really sorry about the no from CSM, particularly because you said he's disappointed, but please know & remind him that CSM really is not all that... time & again we've heard firsthand stories from those who've found UAL not living up to reputation. He's done so brilliantly to get those other offers and should feel really proud of himself.