The new super-union is the two million-strong combination of Amicus and the Transport and General Workers’ Union (T&G).
The joint general secretaries of Unite, Derek Simpson (Amicus) and Tony Woodley (T&G), said the new union will pour resources into organising non-union members across Britain and Ireland, particularly in sectors with younger workers, and will seek mergers abroad to build a global trade union.
Unite will have an annual budget of £15 million for organizing, which will be spent taking on anti-union employers across the economy.
Tony Woodley, joint general secretary of Unite, said: "Two unions with a proud history but an even brighter future come together today to form one progressive, organising, fighting back industrial giant. Unite will be focussed above all on winning for our members in the workplace and taking trade unionism to the millions who need it."