THREE rail companies face the prospect of a summer of Sunday strikes as RMT members take to picket lines in disputes over safety, pensions and pay.

At Hull Trains, workers incensed by the company’s unilateral decision to close its final-salary pension scheme will restart an overtime and rest day working ban on Monday, alongside strikes every Sunday through August — 8, 15, 22 and 29.

The action was called after attempts to resolve the dispute through conciliation service Acas failed.