I don't really know any personally but I can tell you that they all retire in Phuket in Thailand. I think nearly every English bloke I ever met in a bar there was pleased to tell me that he was ex-SAS/Paras/MI5 or similar. They usually went on to say that they couldn't say any more about it though, so sadly I have no further information to share, other than that they still maintain their excellent disguise after retirement, as to most outside observers they all looked a bit like sad, old, fat, lonely men.