London Underground (LU) has said it will not appeal against a judge's decision, which means a Tube strike will proceed on Boxing Day. LU's bid to halt the 24-hour walkout by drivers failed in court. LU's management said they would not resort to the Court of Appeal to try to overturn the decision. Lawyers for LU had argued that the strike had a "false mandate" by extending the ballot to those people who were not rostered to work on the bank holiday.