I really love my On-One Inbred but the lack of rear disc mount was a pain so I needed a new singlespeed frame with similar geometry the answer in the end was Simple, A Cotic Simple infact.
And in my favourite colour, Custard, mmmmm. Now I've only ridden it twice but its like an old friend probably because its been fitted with a bunch of well worn bits including those wacky On-One Mary bars.
The Simple is able to cope with 130mm forks if you want a more laid back descending tool and I'm certainly on the look out for some to get maximum fun out of this baby. The Simple shares the build and geometry of all the Cotic mtb's the Soul and the Soda Titanium, and I would say they are bikes built for the Northants clay ridden trails, the tyre clearance is MASSIVE. After riding in total clag at the weekend there was no build up of mud anywhere on the bike, thats got to be one hell of a weight saving on any ride round here.

Get me some 2.4 tyres oh yes!
Check out the COTIC website If I was specking a team bike I'd be ordering a batch of these babies.
Pitsford cycles are dealers for them, so have a word with Tom and get one on order. Saves you the postage and you get dealer backup.
Don't forget to spec which graphics you want though, you get a choice of three which I never realised, the wrap around white option is pretty pants I reckon.