Arriva trains across Wales will not run on Monday because of a strike by drivers over terms and conditions. Aslef and RMT union members at Arriva Trains Wales walked out for 24 hours, with all its services cancelled. Arriva's Gareth Thomas said the company was "extremely disappointed" that the "latest offer of improvements to terms, conditions and pay" had been rejected. Aslef has denied that a new offer had been made. The pay side of the dispute has been accepted, but Aslef claims Arriva is trying to "railroad through" changes to terms and conditions. The industrial action also means some early morning trains on 5 January could be disrupted.