My lass is boshing around Herne Hill once a week and I am getting a little jealous.
After a frame or bike, ideally in 55cm but 1cm either way is probably fine. Steel or aluminum is cool, soft spot for 653/753. Ideally A head, but quill stems have never failed me yet. Also I like lairy paint. Ultimately not too picky though.
Budget for a frame circa £250, a bike £500 up...
Have you got anything that sounds like that?