Everyone enjoying the spectacle is welcome to send in photos of the flypast as it happens.
Either email them to [email protected] or share them straight onto the Chichester Observer Facebook page.
Or you can tweet us at @Chiobserver
For details on where you can see the flypast, click here
Prince Harry, who is today celebrating his 31st birthday, will join veterans to see the fleet of Battle of Britain aircraft take to the air - the most in any one place since the second world war.
The Battle of Britain Day flypast is being run in conjunction with The Boultbee Flight Academy, based at the Goodwood Aerodrome.
The vintage planes will gather over Selsey bill before soaring over towns hit by the German bombers during the Second World War.
For live updates on the flypast see the Boultbee Twitter page
To follow our live blog click here
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