London Singlespeed Society

…is actually not bad.
http://www.tfl.gov.uk/roadusers/cycling/11598.aspx

I was initially disappointed to find the “Cycling Journey Planner” looks like a lazy modification of the standard TfL journey planner, with the word “cycle” instead of “walk”. However, click on the “start” or “end” maps and it actually gives you a full cycle route breakdown, albeit in multi-page PDF format.  I found it suggested some ‘I didn’t realise that was there’ routes as well as a couple of unnecessarily road-avoiding ones. However, generally as an initial guide to cycling from one place to another in London without being too caught up in traffic, it’s pretty good.

: P