RAIL operator Northern has said it will keep customers informed over the upcoming strike action by the Rail, Maritime and Transport Union (RMT) later this month.

Members of the RMT at Network Rail and 13 train operators will walk out on June 21, 23 and 25, in the biggest outbreak of industrial action in the industry in a generation.

The RMT also announced another 24-hour strike on London Underground on June 21 in a separate row over jobs and pensions.

The union said it will be the biggest strike on the railways since 1989.

A notice on Northern's web page read: "We have been made aware that strikes by RMT union have been called. We are working hard to understand what this means for our network and will update our website once known."

Union members voted overwhelmingly for action last month in growing rows over pay and job losses.

The RMT said rail staff who worked through the pandemic were facing pay freezes and hundreds of job cuts.

RMT general secretary Mick Lynch said: “Railway workers have been treated appallingly and despite our best efforts in negotiations, the rail industry with the support of the government has failed to take their concerns seriously.

“We have a cost-of-living crisis, and it is unacceptable for railway workers to either lose their jobs or face another year of a pay freeze when inflation is at 11.1% and rising."