Waterloo Station in London, the busiest in Britain, was brought to a standstill by a massive signal failure in the early hours of Thursday, 13 April. The station which handles nearly 42 million passengers every year, serves a vast swathe of destinations in the south east of England and beyond. The main operator at the station, South Western Railway, has issued an appeal to would-be passengers to avoid the station, where only a handful of services were able to operate in the morning peak hours.