I have a Chas Roberts Audax 3 years old frameset 56cm top tube and seat tube,
130m rohloff sliding dropouts drop outs, so can be run geared or singlespeed. Very good condition, lovely paintjob, will included velo orange silver threaded headset and ofcourse matching forks, have a decent seatpost as well that you can have.
takes english 68 bb, 27.2 seatpost, mudguards and rear pannier eyelets, can take 28 mm tyre with mudguards, or 32mm without. Takes deepdrop road brakes 49-59m
pics at http://www.flickr.com/photos/harleyphotos/3374692551/