Keir Starmer faces mounting pressure to step down after the Labour Party suffered devastating losses in local elections across the UK.The results saw Reform UK and the Green Party displace Labour in traditional strongholds, ending the party's historic dominance in Wales.Senior party members and union leaders have demanded a clear resignation timeline to avoid further electoral decline for the government.Despite the internal revolt and a significant collapse in voter support, the Prime Minister insists he will remain to avoid political chaos.