Nats will usually agree to such requests with no charge, however the following procedure must be followed: 1. All such requests must be made in writing to the VFR Chart editor at firstname.lastname@example.org with details. If permission is granted, an acknowledgement must be printed: 'Reproduced with the permission of NATS. 2. A request must also be sent to Ordnance Survey at the following address: Copyright Licensing Ordnance Survey Romsey Road Southampton SO16 4GO. OS will also require a printed acknowledgement to accompany the chart extract.