The Outer Circle was a London & North Western Railway service in London that operated from 1872 to 1908. The route was from the District Railway station at Mansion House to Earl's Court, then via the West London Railway to Willesden Junction and then via the North London Railway to Broad Street. Although not a complete circuit, it was one of several 'circle' routes around London that opened at the same time, such as the 'inner circle' that is today's Circle line.[1] Trains would run once every 30 minutes. In 1908 the service was cut back to run from Earl's Court to Broad Street.
The Midland Railway operated a kind of Super Outer Circle from St Pancras to Earl's Court for two years from 1878 to 1880, via the Dudding Hill freight line.