London UCI Track World Cup 2012

I'm looking forward to tonight's session - I reckon the security checks might take a while - And the Bus thing could be a logistical nightmare (I'm guessing they are using buses as most the site is still off limits?)

Yes - I think that's the reason for bussing across the site. It's not a very big capacity at the velodrome and it's the only event on so hopefully the security won't be too bad.
Getting back out might not be great though, with 6000 people queuing for a couple of shuttle buses.