Sport is sometimes accused of taking itself too seriously, but Saturday evening will see a historic London landmark welcoming elite athletes, dogged semi-professionals and high-spirited amateurs alike to the second running of the Smithsfield Nocturne cycling event. Last year's occasion attracted 5000 spectators to the bars and barriers around the 1km course despite heavy rain and was such a success that further similar events around the UK, including perhaps one in Canary Wharf, are......