I was born in London but haven't lived there for a few years (!) so could you help me with timings? Our train arrives at Euston at 09:04 on Saturday. If the road race starts in The Mall at 10:00, I guess we've got plenty of time to travel by Tube down to Putney Bridge to catch it crossing the river? I reckon it's about 5 miles, which will take the race about 10 -15 minutes to cover? Best tube from Euston: Circle line to Edgware Road then change to a District line train to Putney Bridge? Or Victoria Line to Victoria then change to District line?