5.15pm

Transport for London (TfL) says a signal failure this afternoon, is causing severe delays on parts of the Metropolitan Line.

The problem was bang in the middle of the section of the Metropolitan and Piccadilly Lines recently closed for three weeks for an upgrade.

It started at 2.42pm and both lines had to be closed for a time, between South Harrow and Uxbridge on the Piccadilly and Harrow on the Hill and Uxbridge on the Metropolitan.

Engineers attended and the problem was resolved by 4.33pm but severe delays continue on the Metropolitan between Harrow on the Hill and Uxbridge, with minor delays between South Harrow and Uxbridge on the Piccadilly.