Two London Underground lines have been hit with disruption this morning while there are also issues on the Overground.
The Bakerloo line has been hit with severe delays, between Queen's Park to Harrow and Wealdstone because of a signal failure at Harlesden.
Commuters were advised to find an alternative route where possible to avoid the line.
The Hammersmith & City line also faces severe delays due to a power supply problem.
The issue at Harlesden has seen minor delays on the London Overground between Euston and Watford Junction.
London Overground wrote on Twitter: "Please allow extra time for your journeys."
Transport for London said there was a good service on all other lines.
