Donegal TD Padraig MacLochlainn has been blocked from entering the Dail chamber to vote on Budget 2013.
Despite having voted on previous aspects of the Budget, Deputy MacLochlainn says he was physically prevented from entering the Dail to vote on the full bill.
He claims he was blocked by the Captain of the Guard on behalf of the Ceann Comhairle.
Yesterday the Dáil's was suspended for 45 minutes because the Donegal Deputy refused to leave after being suspended.
Sinn Fein says it is now seeking legal advice over what it describes as an 'archaic system'