More engineering work will be taking place this weekend on Tube lines in Harrow.
With London Underground closing parts of two lines, there will be no service between Aldgate and Harrow-on-the-Hill, or between Harrow-on-the-Hill and Uxbridge on the Metropolitan Line on Saturday and Sunday.
Chiltern Railways operate additional services between Harrow-on-the-Hill and Marylebone.
TfL will be carrying out track replacement work near Wembley installing new drainage work in Hillingdon.
There will also be no services on the Piccadilly line between Rayners Lane and Uxbridge.