We set off at 06:30 to get the first of two trains to London, and what would be a very long day!
The journey was kind to us, and we got to the University of Roehampton, our starting point very quickly, once there it was a matter of picking up some additional information from the organisers, and getting in the queue to start.
I have put a link to the route on JustGoRide, and a link to the next event (2013) is at British Heart Foundation. I am currently contemplating entering both this and the on-road events next year!
It was a well organised, and challenging event, I would recommend it to anyone who can cycle 30+ km in one go.