An inquiry has begun into the collapse of a £60m fraud trial which led to the acquittal of six men accused of corruption in connection with the extension of London Underground's Jubilee line.

Judge Ann Goddard finally called a halt to proceedings yesterday, two years after the Old Bailey trial began, in a case described as one of the costliest and most inefficient prosecutions in British legal history.
Judge Goddard cleared the six defendants after the prosecution offered no evidence and said they would not pursue a retrial. Anthony Upward QC said the prosecution's decision to ask for the jury to be discharged was taken with the approval of the Director of Public Prosecutions after a review of the case.