If this is your grandfather....there was a photo attached to the card. The date of birth is off by one year ??
Great Britain, Royal Aero Club Aviators’ Certificates, 1910-1950
Name: Harry Kiddle
Birth Date: 25 Jun 1904
Birth Location: Sounthorpe
http://interactive.ancestry.co.uk/1283/31032_A200012-00168/1...PHOTO
http://interactive.ancestry.co.uk/1283/31032_A200012-00168/1...