The charity seems legit. They have been around for longer than RY has been scamming. Their website shows that he has done events for them in the past - the same situation as for the other charity he was supposed to be running for recently, 'This is Epic' (in the Epic12 event in Guernsey).
Both of these charities, having met Rob in the past, seem to have been bowled over by his legendary charm and are unwilling to believe the allegations of cheating. I exchanged a couple of emails with 'This is Epic'. They were actually really nice and it was clear they care very much for the causes they are raising money for and also about putting on quality events. However, like I said, they consider Rob a friend so were reluctant to believe the allegations. On their second reply to me they seemed to be coming round to the idea it might be true, perhaps due to the sheer weight of evidence and perhaps many other people emailing them as well as me. A few days after this, they announced that Rob would no longer be appearing at their event.
I have been meaning to email The Aegis Trust (the charity behind the Run4Peace relay) but haven't got round to it. Their event is after the release of the report and anyway it looks like it won't go ahead as they have so few people signed up. Either way, chances of Rob appearing there are slim.