Passengers in Hertfordshire are set for more disruption after rail union Aslef announced plans for industrial action over the next several months.

Train drivers from London North Eastern Railway (LNER) are set to stage walkouts every weekend until November, citing a breakdown in industrial relations and breaking of agreements.

The dispute is separate from the long-running row over pay, which is set to be resolved after a new offer this week from the government.

LNER provide trains between London Kings Cross and Stevenage, as well as routes from Stevenage to destinations including Cambridge, Brighton and Peterborough.

The company also puts on services between London Euston and Watford Junction.

Aslef members will walk out every Saturday between August 31 and November 9 and every Sunday from September 1 to November 10, a total of 22 days.

The union says there has been a breakdown in industrial relations, “bullying” by management, and “persistent breaking” of agreements by the company.

Mick Whelan, general secretary, said: “The continued failure of the company to resolve long-standing industrial relations issues has forced us into this position.

“We would much rather not be here but the company has brutally, and repeatedly, broken diagramming and roster agreements, failed to adhere to the agreed bargaining machinery, and totally acted in bad faith.

“When we make an agreement, we stick to it. This company doesn’t and we are not prepared to put up with their boorish behaviour and bullying tactics.”