This event sounds interesting.
[url]http://vcoolsm.org/Tour_of_Cambridge_Gran_Fondo.php[/url]
Its a UCI sanctioned event on closed roads witch you can race in your age group.
The event will also be the first in the UK to offer wild card entries to the UWCT (UCI World Cycling Tour - the amateur world championships where anyone who has qualified can ride for a world championship jersey) world Championships.
There is also a TT the day before which is now full and they expect the Gran Fondo to fill up quickly as well.