By Laura McGuire Natwest’s board is reportedly gearing up to name Paul Thwaite, its current interim chief executive, as the permanent head of the taxpayer backed bank. Natwest has been searching for a successor since the summer after former boss Alison Rose outed herself as the source of a BBC story into the finances of Nigel Farage, who had claimed that Natwest-owned Coutts had ‘debanked’ him over his political views. This evening, Sky News said directors at the bank will discuss tomorrow proposals to announce Thwaite as its new chief executive, alongside its annual results on Friday. It was …