It's an excellent first sportive for those who've never ridden one with a few tough hills, including Whitedown (aka The Widowmaker) as the final climb of the day, but at 70 miles or so it isn't insanely difficult. I rode it last year as preparation for the Etape and got in a good group (eventually whittled down to two of us) and it was great fun.
The event starts and finishes at Leatherhead Sports Centre so is easily accessible from London.
This looks like a nice route. I think the SSTC should get on this one...
This looks like a nice route. I think the SSTC should get on this one...