Lamont also won majorities in two groups of Labour's three - tier electoral college system, securing the support of parliamentarians and affiliated bodies such as trade unions. (en.wikipedia.org)
The current electoral college system gives a third of the votes each to the unions, rank and file party members, and the MPs and MEPs. (itv.com)
Labour leadership elections have previously been decided by a complex electoral college system, with equal weight given to the votes of three groups - one third to MPs and MEPs, one third to ordinary party members and one third to trade unionists. (bbc.co.uk)