Unite general secretary Len McCluskey has denied putting any pressure on Ed Miliband over his shadow cabinet reshuffle.
Speaking to ITV News Reporter Sejal Karia Mr McCluskey said: "Obviously Ed picks his team and whatever that team is we'll be supporting."
The Conservatives have said that the union leader is "the real winner" of the Labour reshuffle.
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The Duke and Duchess of Cambridge met young people who have battled mental health issues on Saturday.
Former Chancellor Lord Geoffrey Howe was Margaret Thatcher's longest-serving Cabinet minister, also taking on the role of Foreign Secretary.
Lord Geoffrey Howe is known by many for his resignation speech which was seen as the catalyst which destroyed Margaret Thatcher.