Rishi Sunak has ordered his independent ethics adviser to look into Nadhim Zahawi's tax row as "clearly in this case there are questions that need answering".
The Tory Chairman and former Chancellor is desperately clinging onto his job amid warnings today that the row over his tax affairs has made his position "untenable".
Despite calls for him to quit, allies of the Cabinet Minister said he had no plans to resign after paying a multi-million pound penalty to resolve a dispute with HMRC.
