Sacked minister Johnny Mercer to lead 'respect our veterans' march through London on May 8 after daughter of soldier shot dead in The Troubles tells of joy as trial of troops accused of murdering IRA leader COLLAPSES Johnny Mercer expressed frustration at a lack of progress on legislation to protect British veterans who served during the Troubles from prosecution Soldier A and Soldier C accused of murdering Official IRA leader Joe McCann A judge in the landmark trial of ruled crucial evidence inadmissible yesterday Mercer last night announced he would be helping to organise a march on May 8