"held up at Clapham Junction"

Railway lines leading from Clapham Junction to central London
Creative Commons Attribution Share AlikeRailway lines leading from Clapham Junction to central London - Credit: mattbuck
 Clapham Junction is a railway station in Battersea, in the south-west of London. The first railway line through the area was built in 1838 and the station opened in 1863. At that time, Battersea was regarded as less fashionable that its neighbour Clapham and so the station was named ‘Clapham Junction’ to attract more middle- and upper-class passengers.

The station is the busiest in Europe, with roughly 2,000 trains (mostly stopping) and 430,000 passengers passing through every day.