Lord King of Bridgwater
AKA Tom King. It looks like wonkpedia's account may need to be rewritten:
"King's career in the Cabinet may appear odd to some observers due to his many quick moves between departments. The moves were a reflection of his ability to 'master his brief' quickly, and as successive crises hit the government it was King who was moved to fill the gap. King never had a strong public profile compared to other members of the Cabinet, but neither did he draw attention to himself by elementary errors or public gaffes."
Of course there's an alternative explanation of why he got moved round so much...