Train Cleaners are to strike on April 14 and April 15- they are members of the RMT union.
They are cleaners employed by private companies, contracted to the Rail Companies.
The companies affected are Avanti West Coast, Great Western, Northern, Govia Thameslink Railway (Southern, Thameslink, Great Northern and Gatwick Express) and South East Trains.
It is not yet known what, if any, impact this will have on train services.