'Hardest Day' flypast: 'It was an absolutely awesome sound'

Tuesday marks the day 75 years ago when the Nazis launched a huge air offensive to try to cripple the UK during what is now known as the Battle of Britain's "Hardest Day".

To mark the anniversary, 18 surviving WW2-era Spitfires and six Hurricane fighters took to the skies of southern England.

The event recalled 18 August 1940, when Bromley's Biggin Hill and other South East military bases came under attack from the German Luftwaffe.

The organiser of the flypast event, Colin Hitchin, told BBC News: "We need to hear those Merlin engines roaring... it was an absolutely awesome sound".