(March 2005, The Guardian),

"No party leader should decide who should stand for parliament regardless of the views of those who chose him or her. The use of organisational methods to suppress dissent in politics is deeply undemocratic and could initiate a procedure that might - if carried to its logical conclusion - allow a party leaders to nominate members of the House of Commons.
..And it is for the same reason that proportional representation on a list system, where the list is drawn up by the party leaders, would be so dangerous. MPs should be loyal to their own beliefs, their constituencies and their parties and not be worrying all the time about whether their party leader might take them off the list for being independent."