Blackfriars, also known as London Blackfriars, is a central London railway station and connected London Underground station in the City of London. It provides Thameslink services: local, and regional and limited Southeastern commuter services to South East London and Kent. Its platforms span the River Thames, the only one in London to do so, along the length of Blackfriars Railway Bridge, a short distance downstream from Blackfriars Bridge. There are two station entrances either side of the Thames, along with a connection to the London Underground District and Circle lines.

St Paul's is a London Underground station located in the City of London financial district. The station, which takes its name from the nearby St Paul's Cathedral, is on the Central line, between Bank and Chancery Lane stations, and is in fare zone 1.