The RMT trade union is balloting train crew members on whether to strike, in a move designed to defend the role of safety guards.
The union is balloting members at 15 train operators the RMT claims have reneged on an early commitment to restore key safety procedures to safety guards.
“They (train operators) all agreed to abide by an independent risk assessment that recommended restoration of elements of the guard’s safety role which had been removed from the rulebook," said Bob Crow general secretary of the RMT.
“RMT believes safety must always come first. We have campaigned against the reduction of the safety role of the guard ever since it was suggested after privatisation, and we will not rest until the guard’s full role is back in the rulebook,” he said.