UrbanRedneck: I don't even know if there was a significant contingent of Irishmen at Falkirk. English control of Ireland at this point was tenuous at best.
There were 3,000 odd Irish infantry during Edward's campaign against Baliol and some 650 Irish Horse and 1,600 infantry during Edward's campaign against the Red Comyn after Falkirk, but I do not believe there were any Irish involved in the campaign against Wallace.