A night Tube driver was attacked after returning his train to the depot sidings in the early hours after duty.
It is said to be the latest in a series of incidents involving drivers returning trains to depots and where they are on their own.
The Jubilee line driver is believed to have disturbed a gang of graffiti vandals who sprayed him with paint, tripped and kicked him before stealing his radio.
The attack, now being investigated by the British Transport Police, happened early yesterday morning.
With the Jubilee train in the sidings at Stanmore the driver responded to an automatic alarm indicating the rear cab door was open.
As he went to investigate he was attacked by a gang of men.
Transport for London’s director of enforcement Steve Burton, said: “This was a senseless and cowardly attack on one of our drivers and we will not tolerate it.
“We are now doing everything in our power to work with the police to bring the attackers to justice.” He said security at Stanmore is now being reviewed.
Finn Brennan, district organiser for the Aslef drivers’ union, called for greater security at depots where trains are left overnight saying the latest incident follows others on the Victoria line.
