Seriously, give either Virgin EC or Virgin Group PR a call. If you're extremely lucky, and get their attention in the right way, you could end up with a VIP invite or something. Get even more lucky, and you could maybe get to meet SRB. Young lad, first time in London, it's got some good PR elements to it… Even if you don't pull something like that off, I'm sure they will be delighted to let you know when they plan to do something, and/or maybe send you a goody bag or something.
Edit: A tip for when talking to them and asking if SRB will be there, the correct etiquette is to refer to him as "Sir Richard", I believe.