|Shadow health secretary - Andrew Lansley
The former civil servant became an active Conservative in the 1980s after a spell as private secretary to Norman Tebbit.
In 1990 he became head of the Conservative Research Department and was one of the architects of the Tories' surprise 1992 election victory. However, he later faced criticism for his central role in the disastrous 2001 poll campaign.
He returned to the shadow cabinet in 2003 under Michael Howard as shadow health secretary, the role he continues to hold under David Cameron.