Which position has not been held by Jack Straw?

John Whitaker "Jack" Straw (born 3 August 1946) is an English politician who served as the Member of Parliament (MP) for Blackburn from 1979 to 2015. Straw served in the Cabinet from 1997 to 2010 under the governments of Tony Blair and Gordon Brown. He held two of the traditional Great Offices of State, as Home Secretary from 1997 to 2001 and Foreign Secretary from 2001 to 2006 under Blair. From 2007 to 2010 he served as Lord Chancellor and the Secretary of State for Justice throughout Brown's Premiership. Straw is one of only three individuals to have served in Cabinet continuously under the Labour government from 1997 to 2010, the others being Gordon Brown and Alistair Darling.

After the Labour Party lost power in May 2010, Straw briefly served as Shadow Deputy Prime Minister and Shadow Justice Secretary, with the intention to stand down from the frontbench after the subsequent 2010 Labour Shadow Cabinet election.