Cool, thanks for the suggestions!
Corshamjim, I saw that website - a touch confusing but lots of info.
Tim Hall, I have looked at the audax calendar. I was scared! It's a possibility. Not sure I am up for the whole 'sleeping in bus shelters' lifestyle. Some of them are 100km though right? Hmmmm....
Feline, I have looked at CTC Suffolk in the past - their rides are a bugger to get to on a Sunday with no car. Cambridge CTC is a possibility though, which I am checking out.
DrMekon, 'it's impossible to get lost with a GPS' that sounds like a challenge to me! I reckon I could manage it!!
And yay! more Reggie Rides
Thanks everyone! Lots of ideas there.