The Civil Aviation Authority's Directorate of Airspace Policy (CAA DAP) has developed a strategy for answering helicopter noise complaints. This includes a well publicised contact point that receives noise complaints from across the UK. Further details are available on the CAA website www.caa.co.uk .
Neither the Department for Transport nor the Civil Aviation Authority maintain statistics on the number of helicopter flights that have been permitted to depart from the designated routes in the London control zone.
Following discussions between the Department for Transport, the Civil Aviation Authority (CAA) and NATS, a mechanism has been agreed with NATS to provide data on helicopter movements over London. This data is published at regular intervals on the CAA website at the following link
www.caa.co.uk.