A police force has been left unable to use its helicopter after blundering staff lost a log book required under aviation rules to fly.
The South Yorkshire Police helicopter has been out of action since the manual went missing three months ago and the force has had to draft in extra air cover.
Without the log, engineers cannot be certain that strict maintenance schedules have been carried out and under strict rules of the Civil Aviation Authority must remain grounded for safety reasons if the information was not available.
Bungling police force grounds helicopter