Hundreds of rail maintenance workers and cleaners are to stage a one-day strike in a row over hours and overtime.

The Rail Maritime and Transport Union last night said 400 of its members at First Great Western will walk out on Sunday, May 18.

The workers, based at Bristol, Reading, Oxford, Penzance, Exeter, Plymouth, Swansea and London, voted three to one in favour or taking industrial action.

The union said there had been a breakdown of talks and accused the company of refusing to pay an enhanced rate for overtime worked or to concede a 35-hour week for all the workers.