A series of strikes by LNER train drivers has been called owing to what Aslef called a failure of industrial relations and the breaking of agreements by the company.
The disagreement is not related to the salary dispute, which members will vote on following this week's fresh proposal from the government, which has been agreed in principle with Aslef.
LNER operates the passenger service between London and Edinburgh on the East Coast main line.
A Treasury minister said a new wage offer for train drivers is a "good deal for the taxpayer" since it would put an end to strikes, despite assertions from the opposition that it could lead to higher prices or tax increases.
The agreement would include a backdated 5 per cent rise for 2022 to 2023, 4.75 per cent for 2023 to 2024 and 4.5 per cent for 2024 to 2025.
Chief Secretary to the Treasury Darren Jones told broadcasters on Thursday: “Resetting the relationship between Government and public sector workers in this instance is a good deal for the taxpayer because we are preventing strikes from happening.
“There is a direct cost to the economy if the strikes continue and we need to work together in partnership with workers and trade unions and business to get sustainable growth back into the economy.
When are the strikes and why are they happening?
When are the strikes?
Aslef-affiliated LNER employees will go on strike every Saturday from August 31 to November 9 and every Sunday from September 1 to November 10, a total of 22 days.
Why are they happening?
Aslef filed complaints against LNER, citing "persistent breaking" of agreements, "bullying" by management and a decline in worker relations.
Mick Whelan, Aslef's general secretary, said: “The continued failure of the company to resolve long-standing industrial relations issues has forced us into this position.”
Adding: “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.”
An LNER representative in return said: "Our priority focus will be on minimising disruption to customers during the forthcoming Aslef strikes, which sadly will continue to cause disruption and delays. We are surprised and disappointed to hear this news following recent constructive conversations."
The representative added: “We will continue to work with Aslef to find a way to end this long-running dispute which only damages the rail industry.”
When were the last strikes by Aslef?
A dispute over terms and conditions led Aslef members at LNER to walk out in April, affecting services between King's Cross and Leeds and King's Cross and Edinburgh Waverley.There are 16 train companies involved in this conflict, which is distinct from the national wage dispute.
What other strikes could Londoners face this summer?
Border Force agents who are part of the the Public and Commercial Services Union (PCS) will go on strike from August 31 to September 3 at Heathrow Airport, after which they will follow a work-to-rule policy that involves refusing overtime until September 22. The dispute focuses on "enforced changes to terms and conditions" and involves 650 of the union's members, according to PCS.
At London City Airport. the GMB has said it will call for possible strikes by baggage handlers In a dispute over salary. Members of the union, who make up about 120 of the airport's baggage handlers, are requesting a 17 per cent salary increase to match their counterparts at Gatwick.
GMB said if negotiations fail and industrial action is taken, it will be the first significant stoppage in the 37-year history of the airport.
