The Miliband brothers are the only two to have officially launched leadership bids.

Viewed as being on the left of the party, he backed Kenneth Clarke's leadership bids.

It certainly gives Chris Huhne the opening he was looking for to make his leadership bid.

He resigned from Cabinet in April 2005 to pursue his leadership bid on a full-time basis.

Johnston's leadership bid received support from many on the left-wing of the party.

Keating's leadership bid failed and he moved to the backbench.

In 1968, he was the only member of the party's parliamentary caucus to support Sidney Green's leadership bid.

In 1981 he quietly organized a team for his leadership bid, while making sure not to undermine Clark's leadership.

Clark launched her leadership bid saying she wanted a "family-first agenda".

Arthur Greenwood's leadership bid, meanwhile, was severely hampered by his alcohol problem.