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 .
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