Eurostar rail workers from two unions are to take part in two concurrent periods of strike action this month in a dispute over their work-life balance.

RMT members will walk out from 12 to 15 and 27 to 29 August while TSSA members will strike on 14 and 15 and 28 and 29.

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Eurostar said all passengers with reservations would be able to travel.

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Eurostar runs services between London and mainland Europe and the walkout coincides with the Assumption Day bank holiday in France and Belgium on 15 August and the 29 August bank holiday in England, Wales and Northern Ireland.

A Eurostar spokesman said: "On the days of the strike [Eurostar] have made some small modifications to [their]  timetable; ......, with only one train a day to be cancelled in the first phase of industrial action. It said all passengers who had already booked would be accommodated on alternative trains.

ADDED 

The following trains will be cancelled:

Friday 12^th August

• 9114, 8:04am departure from London to Brussels

• 9133, 12:52 departure from Brussels to London

Saturday 13^th August – We expect to operate a normal service as scheduled, please check in as normal.

Sunday 14^th August:

• 9035, 14:13 departure from Paris to London

• 9045, 16:43 departure from Paris to London

• 9016, 10:01am departure from London to Paris

• 9040, 16:31 departure from London to Paris

Monday 15^th August:

• 9013, 08:43am departure from Paris to London

• 9008, 07:55am departure from London to Paris

If booked to travel on one of these trains you will have been contacted offering the option to exchange for another train on your scheduled day or to an alternative date.

If you have booked via Eurostar.com and would like to change your booking free of charge for an alternative time or date, you can do so by going to 'Manage Your Booking'(https://www.eurostar.com/uk-en/manage-booking).