In response to wide scale public sector strike action last week, David Cameron has stated that the Conservative Party's 2015 general  election manifesto will include a promise to introduce a threshold for the number of union members  who need to take part in a strike ballot. Currently, a simple majority of those voting is required  for industrial action to take place, with no minimum voter turnout. The Government is also  reportedly considering imposing time limits on the validity of strike ballots. In support of these  suggestions, the Government stated that the teacher strike action last week was based on a vote  that took place in 2012 with only a 27% voter turnout.