A four-day closure of the Metropolitan line is scheduled between Harrow-on-the-Hill and Amersham, Chesham, and Watford from Thursday, February 19th to Sunday, February 22nd, 2026, due to signalling works.
No trains will run north of Harrow-on-the-Hill station, and replacement buses will operate, with significant delays expected due to concurrent roadworks.
Affected Area: Metropolitan line, North of Harrow-on-the-Hill (to Amersham, Chesham, Watford).
Affected Operators: London Underground and Chiltern Railways (between Marylebone – Amersham – Aylesbury Vale Parkway).
Impact: No service on the Metropolitan line north of Harrow-on-the-Hill.
Replacement Bus Info: Rail replacement buses will serve affected stations, but journeys will be much longer.
Important Advice: Passengers travelling from Amersham, Chesham, Chalfont & Latimer, or Chorleywood will likely need to change buses at Rickmansworth, potentially adding up to an hour to journeys due to roadworks.