Question to the Attorney General:

To ask Her Majesty's Government, for the last available year, how many cases were not proceeded with in magistrates' courts on the date fixed for trial because of a failure by the prosecution to disclose evidence.

CPS data for 2016-17 records that there were prosecutions of 499,816 defendants completed in the magistrates’ court, resulting in the conviction of 423,715 defendants, a conviction rate of 84.8%.

There are a number of reasons why a case may not be proceeded with after charge. Review of cases is a continuing process and prosecutors must take account of any change in circumstances that occurs as the case develops, particularly as details of the defence case become known.

Internal CPS case outcome recording data does not record cases by reference to the date on which the decision not to proceed was made. It is therefore not possible to provide data for cases that were not proceeded with on the date fixed for trial. Issues relating to the failure to disclosure unused material accounted for 1% of the cases that did not result in a conviction in the magistrates’ court in that year.