The Unite trade union has served notice of industrial action on the Construction Industry Federation after crane operators in the union voted almost unanimously to extend their pay dispute.

Until now, the dispute only involved crane drivers employed by agencies and non-CIF firms.

The construction sector faces possible widespread industrial disruption from the middle of next week when the notice period expires.

The Construction Industry Federation has previously described the Unite pay claim for crane operators as unsustainable, and the industrial action which has already closed a number of sites as irresponsible.