I cycled from ED to Horseferry Road in SW1 (4.5 miles each way) on a Trek Hybrid for about 8 years. My journey took about 25 mins in the morning (Lyndhurst Way, Southampton Way, Portland Street, back of Elephant & Castle), but 30 mins in the evening as I was tired, but I came back along Camberwell New Road which has a useful bus lane. I enjoyed the commute and it certainly kept me fit without the need to have to go to a gym (I'm lazy). My main cycling tips are to: - avoid cycling too fast to reduce the chances of either hitting a car or pot hole; - get kevlar lined tyres fitted (they do not cost that much extra) to significantly reduce the number of tyre punctures that you will inevitably will get; - but learn how to mend your own tyre punctures - practice makes perfect; - use fingerless cycling gloves - they keep your hands and fingers just as warm as normal gloves, but they don't require you to take them off to do other things when you are not cycling. The cheapest place that I found for major servicing the Trek was Dialabike in Strutton Ground, SW1. However 18 months ago I took up motorcycling and haven't looked back. Although biking (as opposed to cycling) is seen as being more dangerous (and as a Department of Transport civil servant I know all the statistics!), I feel much much less vulnerable on the Suzuki in traffic than on a push bike. When I used to cycle I tended to find myself hemmed into the side of the road in busy traffic and was always concerned that some idiot car or lorry driver would plough into the back of me. On the Suzuki, I can position the bike in the centre of the road and know that no one can get past me, especially given the bike's quick acceleration. It also provides a great means of transport for long journeys. I am moving jobs to Hammersmith soon (8.5 miles each way) and on the Suzuki it will take about 25 minutes without a sweat, as opposed to around 50 minutes on a push bike and a very large sweat. Taking into account 'recovery time' on the Trek, the Suzuki will save me almost 1 hour per day. The 10 year old Trek is still going strong. I regularly take it out for a spin at weekends with the kids and find that my enjoyment of cycling is now much stronger as I don't associate it with the daily grind of having to commute. I guess I feel a slight twinge of regret in no longer cycling each day to work, but this is far outweighed by the benefits of motorcycling.