Three London Underground lines which go through Harrow will be suspended this weekend.
On Saturday March 15 and Sunday 16 there will be no service on the metropolitan line between Wembley Park and Northwood, and between Wembley Park and Uxbridge.
The closure will be in operation while Transport for London replace track near Preston Road and Eastcote.
TfL says there will be a fast service in operation between Harrow-on-the-Hill and Amersham with additional service running on to Marylebone.
There will also be no service on the Piccadilly Line between South Harrow and Uxbridge for the track replacement at Eastcote.
On Sunday March 16 Overground services will also be suspended between Watford Junction and Queens Park from 12.15pm to 8.45pm.
TfL says there will be replacement bus services available throughout the weekend on all lines which are suspended.
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