Train drivers at 12 rail companies will strike again as part of an ongoing a dispute over pay, the Aslef union says.
It will be the biggest strike that the drivers have taken part in so far.
Staff will walk out on 15 September, after talks broke down over pay, with the union seeking wages to keep pace with the rising cost of living.
Union general secretary Mick Whelan said workers didn’t want to go on strike but said the train companies had forced their hand.
The strike is the latest of several in the rail industry in recent months.
Drivers have previously walked out on 30 July and 13 August, causing disruption and cancellations to train services across the country.
Train drivers at the following companies are set to strike:
The Rail Delivery Group, which represents train operators, has previously said it wants to give its workers a pay rise but added “to fund it unions must recognise that as an industry that has lost 20% of its revenue, we can either adapt or decline”.