A specialist police task force has been commissioned to review evidence after celebrity chef Nigella Lawson admitted in court to taking cocaine. The TV cook owned up to using cocaine and marijuana when she was questioned as a witness in the fraud trial of her two former aides, sisters Francesca and Elisabetta Grillo, earlier this month (Dec13). The women were found not guilty at a court in London on Friday (20Dec13) and police officials subsequently declared they would not be investigating Lawson's drug admissions, but Scotland Yard has now released a new statement to clarify its position. The statement reads, "After the MPS' (Metropolitan Police Service) decision not to investigate at this stage was queried in press reporting, we would like to clarify the position with regard to this witness (Lawson). The senior investigating officer received legal advice that the witness's admissions did not by themselves provide sufficient evidence to bring charges. "On that basis therefore, and in absence of any other corroboration, there is no imminent prospect of a prosecution being mounted. As we said however, should any evidence come to light that can be investigated further, we will review this decision. A specialist team from the MPS will nevertheless examine all the evidence emerging as part of a review into this matter and in conjunction with the Crown Prosecution Service, will determine an appropriate way forward." Lawson previously branded her involvement in the trial "a ridiculous sideshow" and criticised officials for not giving her the right to respond to allegations suggesting she was a habitual drug user.