The British Labour Party leadership election of 1983 was held following the resignation of James Callaghan. Callaghan had served as Labour leader (1975 - 1983) and Prime Minister (1979 - 1983).
As with the 1973 leadership contest there was a widespread expectation that the frontrunner (in this case Healey) would win convincingley on the first or second ballot, only to go on to a long and pertruded contest.
Healey had the support (in private) of Prime Minister James Callaghan and was initially seen as the only right wing candidate.
Tony Benn - who had resigned from the cabinet following the 1983 election - entered the race as the Anti EEC left wing candidate, but his canididacy was initially seen as symbolic rather than real.
Healey won the third ballot runoff by a large majority, largely attributed to the Healey camp downplaying their candidates numbers, in an attempt to woo soft left wing MP's who didn't want the more hardline Benn to become leader but who also did not like Healey. This gave Healey a large majority and a better mandate amongst MP's.