The track and drainage is being replaced to increase reliability and shorten journey times. This section of line runs in single bore tunnels which means there is less room to work in than on other parts of the network.
To speed up the work by allowing contractors longer on site each night, the line will close early between Aldgate and Wembley Park on Mondays, Tuesdays and Wednesdays.
These closures will not take place on Bank Holidays and for some Wembley events. The next Wembley events when the work will not take place are on Wednesday 2 November, Tuesday 15 November and Wednesday 7 December.
The closures will also be suspended from Thursday 22 December to Monday 2 January.
A revised Metropolitan line service will operate north of Wembley Park:
Use the Jubilee line for travel between Wembley Park and Baker Street.
Use the Circle or Hammersmith & City line for travel between Baker Street and Aldgate.
Chiltern Railways services also run between Amersham, Chalfont & Latimer, Chorleywood, Rickmansworth, Harrow-on-the-Hill and Marylebone.
|From|| To|| Mondays - Wednesdays |
|Chesham|| Baker Street||21:01|
| Wembley Park||Aldgate||21:54|
Later trains run on all branches. After the times above, change at Wembley Park for the Jubilee line to Baker Street.
|From||To|| Mondays - Wednesdays|
| Baker Street||Watford||22:13|
Later trains run between Wembley Park and Amersham, Chesham and Uxbridge. Later trains run between Harrow-on-the-Hill and Watford.
| From ||To|| Mondays - Wednesdays |
| To || Tuesdays - Thursdays|
Earlier trains on the Watford branch run from Harrow-on-the-Hill and on all other branches from Wembley Park.
|From||To|| Tuesdays - Thursdays |
|Uxbridge|| Baker Street||05:12|
| Wembley Park|| Baker Street||05:28|
| From || Departs ||To||Arrives|
| Baker Street||05:42|| Wembley Park||06:01|
| Wembley Park||05:05|| Baker Street||05:22|