Many thanks for the opinions and offers, I appreciate all the responses.
hopefiendboy, feel free to pursue the kind offer from jonnyboi, that Radon frame looks great but I fear an 18″ one would be a little tall for me. Given the positive responses, the drop in price to £150, the fact that I already have a 120mm travel fork (Manitou Marvel Pro) and the uncharacteristically supportive understanding of SWMBO (it must be a trick), I’ve ordered an Iroko 3 frame. Of all the suggestions, I think it would suit the kind of riding I do the most and be more compatible with components I already have.
chakaping, any idea how I can contact Guy Kesteven? I’d be interested in clarifying his slightly conflicting comments.
All I need now is a crankset, brakes and stem (current stem is 60mm which wouldn’t suit and the BB is square taper so they won’t be transfered). Time to find some second hand bargains. Thanks for the input gentlemen!