Central line (London Underground) and Great Eastern Railway buildings east of , from when the line to Epping was a rural branch line. In terms of total passengers, the Central line is the busiest on the Underground. In 2011/12 over 260 million passenger journeys were recorded on the line. It currently operates the second-most frequent service on the network, with 34 trains per hour (tph) operating for half-an-hour in the westbound direction during the morning peak, and between 27 and 30 tph during the rest of the peak. This makes the Central line the busiest and most intensively-used railway line in the United Kingdom:
London Underground mosquito London Underground mosquito The London Underground mosquito is a form of mosquito in the genus "Culex". It is found in the London Underground railway system as its name suggests, but has a worldwide distribution and long predates the existence of the London Underground. It was first described as a distinct species from Egyptian specimens by the biologist Peter Forsskål (1732–1763). He named this mosquito "Culex molestus" due to its voracious biting, but later biologists renamed it "Culex pipiens" f. "molestus" because there were no morphological differences between it and "Culex pipiens". Notably, this mosquito assaulted Londoners sleeping in the Underground