The Tube has been hit with a string of delays during rush-hour on Tuesday evening with the Piccadilly, Jubilee and London Overground affected.
Meanwhile disruption continues on the London Overground at Richmond after an earlier incident at Kew Gardens.
“Lines have now reopened following a problem that needed investigating at Kew Gardens,” National Rail said.
“Trains running between Richmond and Gunnersbury may still be cancelled or revised whilst service recovers.”
Disruption is expected until 9pm.
