Haven't seen this advertised anywhere (apologises if I've missed it).
Apparently it 'sold out' very quickly last year, so you might have to get in there quick.
http://www.ukcyclingevents.co.uk/events/wiggle-no-excuses-sportive-2012/#buynow
2 routes - 45 and 80 miles.
I've no idea about any of it, but have just signed up to the 80m. Currently talking my better half into signing up for the 45...