Train drivers at nine rail companies will stage a one-day strike in August.
Trade Union Aslef has announced its members will walk out on Saturday August 13, saying the firms failed to make a pay offer to help members keep pace with increases in the cost of living.
News of fresh industrial action was announced on the day (Wednesday) that strikes by members of the Rail, Maritime and Transport union and Transport Salaried Staffs Association crippled services - with only around one in five trains running and some areas having none at all.