Prince Harry is expected to spend his 31st birthday taking part in a Battle of Britain flypast to mark the 75th anniversary of the historic aerial conflict.
Around 40 Spitfires, Hurricanes and Bristol Blenheim bombers will fly in formation in tribute to the Second World War pilots famously dubbed "The Few" by wartime leader Winston Churchill for their efforts defeating the Luftwaffe.
Tom Neil, 95, a former wing commander and Battle of Britain Hurricane and Spitfire pilot, will lead the formation from the rear of a two-seater Spitfire - the symbol of Britain's fight against Hitler's Nazi forces.
The event has been organised by the Boultbee Flight Academy, based in Chichester, West Sussex, and the fighters and bombers will fly over wartime airfields across southern England .
Two of the aircraft - a Spitfire and a Hurricane - fought in the famous battle.
The flypast takes place on the Harry's birthday - September 15 - but exact details about his involvement have yet to be released.
When the Prince met pilots in August last year who were training for the event he flew in a two-seater Spitfire and took the controls so is likely to repeat the experience and join the flypast.
A former para and an RAF corporal will also take part in the event after winning places on a Spitfire scholarship training programme for wounded servicemen and women, and veterans.
Nathan Forster, a former private in the Parachute Regiment, from South Shields, Tyne and Wear, suffered severe damage to his left leg in an IED blast while on patrol in Helmand Province, Afghanistan, in 2011.
Corporal Alan Robinson, an RAF aircraft technician, from Market Rasen, Lincolnshire, lost a leg in a motorbike accident.
The scholarship was established by the Boultbee Flight Academy and is supported by the Royal Foundation of The Duke and Duchess of Cambridge and Prince Harry's Endeavour Fund - which donates money and offers practical help to sporting and adventure challenges for wounded ex-service personnel.
Both men followed a similar flight training programme as Second World War pilots, progressing from a Tiger Moth to a Harvard and finally to the Spitfire.
The scholarship draws inspiration from famous wartime pilot Douglas Bader, who notched up 20 individual aerial victories despite losing both legs in 1931.
During the day, Harry will meet the aircrafts' owners, pilots and engineers at Goodwood Aerodrome in West Sussex, and chat to some of the few remaining Battle of Britain veterans.
The event will be featured in a two-part documentary on Channel 4, with a preview on September 13 and an as-live broadcast of the flypast on September 15.