A strike called for next week on London Overground has been suspended after Arriva Rail London made an improved pay offer, but the RMT is warning that although the 48-hour stoppage called for Monday and Tuesday has been cancelled its dispute with ARL is not over. The union had also called a second walkout on 4-5 March, and it is not clear if that could still go ahead unless the union’s members accept the offer from ARL, which operates London Overground on behalf of Transport for London.