At least four of his shadow group gathered with members of the RMT union, which is organizing three national departures this week. His own deputy, Angela Rainer, backed the action on Twitter, undermining the Labor leader’s attempt to forge a compromise. More than 50,000 RMT members have left due to layoffs and wage increases below inflation, and the union’s secretary general has threatened to keep it until the summer. London Underground staff are also on strike today. Starmer was already opposed by his party’s left, with more than a dozen Labor MPs publicly supporting the strikes.