Sir Roger Carr, current chairman of Centrica. Carr is also president of the Confederation of British Industry (CBI)Photograph: Bloomberg via Getty ImagesOn Monday Barclays announced that it had appointed Sir Michael Rake, a former top accountant and senior independent director on the bank's board, as deputy chairmanPhotograph: Micha Theiner/City AM/Rex FeaturesFormer British ambassador to the United Nations Sir Jeremy GreenstockPhotograph: Shaun Curry/AFP/Getty Images
Former cabinet secretary Sir Gus O'DonnellPhotograph: Linda Nylind for the GuardianSir Nigel Rudd quit as deputy chairman of Barclays in 2009 to concentrate on his job as chairman at technology company InvensysPhotograph: Jason Alden/Rex Features
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