Air tests over the SW peninsular are a regular daily occurrence. They tend to operate between Ilfracombe and The Isles of Scilly. Indeed, London Military even operate an advance booking system for such flights and require 24 hours notice because of demand. Checks usually involve flying level at around FL170 and FL350 and include manual reversion. Such flights tend to be of about 2 hours duration. Similar test flights take place over East Anglia, again working London Mil.