Another tool used by the UK government to undermine democrasy in Britain.

Any MP who defies a Three Line Whip is suspended from his party for an indefinded period (anything from one day to life). This can end the career of an MP and thus discourages members from voting with for wishes of their constituents
The threat of the withdrawl of the whip forced through the vote that resulted in Britains involvement in gulf war 2
by black flag June 5, 2004
Get the withdrawing the whip mug.