2012-06-23 Sat - The Maths Geek Ride 0001.5 - London to Bletchley to London

There have been murmurings from the ranks of possibly doing a faster and slower ride out (Coinciding to arrive around the same time), with only the fast group riding the return leg.

Any thoughts?

That sounds a good idea. Skully mentioned it to me.
How much earlier would the slower people need to set out to arrive at the same time?
Or would the fast people go a circuitous route and if so how many additional miles?