- 1 March
- 1866 – Metropolitan Railway's City Widened Lines first used.
- 1880 – District Railway extends from West Brompton to Putney Bridge.
- 1883 – District Railway extends over the Great Western Railway from Ealing Broadway to Windsor.
- 1910 – District line extends from South Harrow to Rayners Lane where it connects to Metropolitan Railway.
- 1910 – District line extends over Metropolitan Railway from Rayners Lane to Uxbridge.