A small bunch of us (us, being inline speedskaters) try to do this every Monday evening after work as a means of cross training. Due to time constraints, we only usually manage about 4 laps.
If you're anything like me, you'll probably look out for the bike rather than the cyclists....so keep an eye out for a "train" consisting of a white and grey
Condor CX, black and grey B Twin, white and grey Trek (usually leading!), white and red Specialized (currently off the road) and a black Scott.
These are loosely arranged here:
http://www.londonspe...p?p=49921#49921
Feel free to say hello, and if overtaking at an attainable speed, don't be surprised if we try to tag along :-)