On the 75th anniversary of the Battle of Britain early this month, the UK's warbird community gathered to put on a spectacular series of fly-pasts for the public. Beautiful old Spitfires and Hurricanes are joined by a Bristol Blenheim in a tribute to the pilots, crews and ground crews that fought desperately to stave-off invasion. So, who likes the sound of a Rolls-Royce Merlin engine?
