Hi,
Just got an older large model last week and it measures 465mm ,centre b/b to top of top tube.
I am 6'2" and 33" inside leg and it suits fine,however the medium version is the size I would plump for if you want an aggressive AM type set up or even for general XC stuff.
I currently run a 70mm stem on my rig you might want to got down to 50mm ,see what fits really . But medium would be a must for you.
Bomber build quality from british steel and a british company. All good .
(crocodillian) Mine is currently grey but will get it painted some time soon in BFE orange,according to Paul at Cotic it is PANTONE 1655C.