Two lines on London Underground will be partially suspended this weekend.
There will be no service on the Metropolitan Line from Wembley Park to Uxbridge and Northwood on Saturday February 22 and Sunday February 23.
Transport for London says fast trains will be in operation between Harrow-on-the-Hill and Amersham and also there will be additional Chiltern Railways Services in operation to Marylebone.
There will also rail replacement busses in operation throughout the weekend.
There will also no service on the Piccadilly Line between South Harrow and Uxbridge with rail replacement busses in operation.
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