Conservative MP Richard Ottaway said strikes should be banned unless at least 50% of members voted for them. The prime minister replied: "Just one quarter of Unison members voted to strike, just 23% of those balloted at Unite voted in favour."
Unison and Unite only balloted members who belonged to the affected pensions schemes. Unison had a 30% turnout for its members in local government who voted 75% in favour of a strike and a 25% turnout for its NHS workers, 82% of whom backed strikes.
Unite workers voted 75% in favour of strikes - on a turnout of 31%.
Downing Street aides said the prospect of banning strikes which did not get the backing of at least 50% of a union's members was never "off the table" but added: "We are not at that stage."

Let's see now. General election 2010 - turnout, 65%; Conservative share of the vote, 36%: Percentage of electorate voting for Cameron's Conservatives, 12-. Post-Liberal share of the vote, 23%: percentage of electorate voting for Clegg's clique, 8.5-. Combined percentage of electorate electing (though not voting for) the Con-Dem conspiracy, circa 20%.
Not at the 50%+ stage yet.