Rishi Sunak has ordered an investigation into Nadhim Zahawi as the Tory party chairman faced growing calls to quit after paying a penalty to resolve a multimillion-pound tax dispute.The Prime Minister asked new ethics adviser Sir Laurie Magnus on Monday to assess whether the former chancellor breached the ministerial code with the HMRC settlement.

Rishi Sunak has ordered an investigation into Nadhim Zahawi as the Tory party chairman faced growing calls to quit after paying a penalty to resolve a multimillion-pound tax dispute.The Prime Minister asked new ethics adviser Sir Laurie Magnus on Monday to assess whether the former chancellor breached the ministerial code with the HMRC settlement.