LONDON (Reuters) – Postal workers, teachers and university staff across Britain went on strike on Thursday to demand better pay, with warnings that there will be more industrial action and widespread disruption in the run-up to Christmas. More than 70,000 staff at British universities, teachers across Scotland and Royal Mail postal workers walked out amid a growing number of disputes as workers and businesses grapple with a cost of living crisis. The general secretary of the University and College Union (UCU), Jo Grady, said the planned three-day walkouts were the “biggest strike action in the…