Tesco's UK chief Richard Brasher to step down In addition, it has been widely rumoured that Mr Clarke and Mr Brasher - whom Mr Clarke appointed to run the UK, in contrast to his predecessor Sir Terry Leahy, who juggled the chief executive's job and the UK operations - do not get on. Mr Brasher spearheaded the supermarket's "Big Price Drop" campaign unveiled last autumn. Tesco declined to comment.