Train drivers at LNER will withdraw all non-contractual overtime from November 27. The Aslef union members at the train company voted to take the action in a dispute over terms and conditions.
LNER operates services on the East Coast main line. The row is separate from the pay dispute Aslef has with a number of train operators.
Mick Whelan, Aslef’s general secretary, said: “This dispute is about terms and conditions, not pay. It’s about the way the company has treated its staff – our members – and tried to ride roughshod over our working agreements.