Roy Greenslade: Boris Johnson 'condemns' former Fleet Street editor for piece revealing IRA support Roy Greenslade claimed he had long backed the violent tactics of Irish republicans, saying: 'I am pleased at last to come out from hiding' 1 March 2021 • 5:19pm Roy Greenslade, once the editor of the Daily Mirror, said he supported the "use of physical force" by Irish republicans Credit: Getty Images Boris Johnson "outright condemns" Roy Greenslade’s public support for the IRA, his spokesman said as the former Fleet Street editor resigned his university role. Mr Greenslade, once editor of the Daily Mirror, provoked outrage with an essay outlining his long-held Irish republican sympathies and declaring his support for IRA violence.