The Ulster Unionist Party anti-agreement pressure group, Union First, has started a billboard and postcard campaign aimed at highlighting what they describe as the British Prime Minister's "broken promises".
Announcing the campaign, Mr Jeffrey Donaldson MP said Mr Blair seemed to have "conveniently forgotten" his pledges.
"Tony Blair made his personal pledges to the people of Northern Ireland last year during the referendum campaign. We are demanding that the Prime Minister honours his commitments and fulfils his pledges," he said.