The CBI has been pressing ministers to change the law so that 40% of union members balloted would have to support a walkout before it could go ahead, while London Mayor Boris Johnson believes at least 50% of those balloted should vote.
Research by Labour MP John McDonnell shows that if the same criteria was used during a general election, the Commons would be left with just 38 MPs who won the support of 40% or more of the total electorate in their constituencies, with those losing out including Deputy Prime Minister Nick Clegg and Chancellor George Osborne.
http://www.mirror.co.uk/news/latest/2010/10/13/most-mps-would-fail-ballot-plans-115875-22629857/