Union leaders yesterday urged Labour supporters to vote in next week's election despite reports that the party's plans for public services could be met by industrial action.
The GMB union has placed adverts in magazines and newspapers read by union members warning that a low turnout would help the Tories.
The advert carries a photograph of Tory leader Mr William Hague outside Downing Street and reads: "If you don't come out to vote he'll be moving in."