Three underground lines and the London Overground were blighted with severe delays this evening.
The Metropolitan line is part suspended between Harrow on the Hill and Aldgate, due to a signal failure at Wembley Park.
While there are also severe delays on the rest of the line due to a faulty train earlier.
A faulty train at Baker Street has also caused issues for the Circle and the Hammersmith & City lines.
Meanwhile, the London Overground is facing severe delays between Stratford and Richmond.
This was due to overhead line problems earlier.
TfL said there was a good service on other routes on the Overground, as well as the rest of the Underground.
