HISTORIC strikes over pay could hit summer supplies of “Scotland’s other national drink” Irn-Bru, Unite warned today.

The union confirmed its members at world-renowned soft drinks manufacturer AG Barr are balloting for walkouts because bosses are “attempting to force through” a below-inflation 5 per cent wage deal. 

The vote, which opened today and closes on July 6, involves about a dozen trucker and shunter drivers at the company’s Cumbernauld production and distribution centre, it said.