The 25 May 1921 witnessed the Second Battalion of the Dublin Brigade IRA enter the Custom House. The masterpiece of James Gandon, and the home of the Local Government Board, it was set on fire in minutes. But the fire became an inferno only after the fire brigade arrived. How exactly did this happen? Fire brigade historian and author Las Fallon joins me to discuss a remarkable day of collusion between the DFB and the IRA.