I'm thinking of a Convoy starting in Essex, sweeping round via Kent, Sussex, Surrey, Berkshire and onwards to Wells. Possibly dropping off in a similar fashion on the way home.
As you prob seen there's a noon meeting arranged just off the M4 near Bath (Jn 18 I tink it is). A bit early perhaps if starting 100 miles away but should be good.
Think we should aim for a truly massive convoy on the way back. Everyone travelling at different times from different places on the way down, so not really feasible.