Provisionally, could do this, but would probably have to meet everyone at the Silver Ball (presume that's the SG p/code?). Which might work out nicely for me, as I could use a different route to last one and stay off that bloody M25 nightmare, at least on inbound route.
By the way, the A507 Buntingford to Baldock road is a cracking little ride, if it could be worked in, or if anyone gets the chance another time.