I cycle between ED & Stratford. Just under 9 miles. Peckham, Surrey Canal, Southwark Park eventually to Rotherhithe Tunnel then pick up another canal to Mile End after which it's the main road. It takes quite a long time I think because there are 19 sets of traffic lights between Stratford & Mile End all of which seem timed to catch cyclists. The journey can take 2 hours by public transport though.