Moreover, two other stations on the same District and Circle lines (Cannon Street and Monument) are also nearer to Mansion House than its namesake.

From 1 August 1872, the "Middle Circle" service also began operations through Westminster running from Moorgate along the MR's tracks on the north side of the Inner Circle to Paddington then over the Hammersmith & City Railway (H&CR) track to Latimer Road, then, via a now demolished link, to the West London Line to Addison Road and the MDR to Mansion House.

From 1 March 1883, the District operated a service between Mansion House and Windsor, using Great Western Railway tracks from a junction installed just east of Ealing Broadway station, but it was unremunerative and ceased on 30 September 1885.

[8][9][10] On 10 October 1884, the MDR and the MR jointly opened the line eastwards to Mark Lane station (closed 1967), thereby completing the "Inner Circle".

[11] In 1897 the MDR obtained parliamentary permission to construct a deep-level railway running between Gloucester Road and Mansion House, beneath the existing sub-surface line.

It featured a tall glazed screen with the Underground roundel similar to his station designs for the extension to Morden of the City & South London Railway (now the Northern line) opened between 1924 and 1926.

During the weekend of 8–9 October 2016 the west-facing bay platform number 2 was decommissioned and the track removed; all District line trains now continue to Tower Hill.