The cine film, shot on Holkham Beach near the Sandringham Estate in Norfolk in 1957, shows an instantly recognisable Prince Charles at the age of eight, though his six-year-old sister, with curly blonde hair and milk teeth, has yet to develop the Windsor family traits.
The Prince of Wales has included several family holiday films in his own personal television tribute to his mother, in which he also describes seeing her practising wearing her crown for the Coronation while he was in the bath.
The Queen and the Duke of Edinburgh have long been known as keen amateur film-makers, with the Queen in particular spending hours shooting footage aboard Britannia and during private family holidays.
The Prince’s BBC One documentary, A Jubilee Tribute to The Queen, also includes clips from a behind-the-scenes film of the Coronation, commissioned by the Queen as her own personal record, and showing how she kept her children under control whilst wearing her crown.
Recalling the Coronation, the Prince says: “I remember Mama coming up when we were being bathed as children, wearing the crown. It was quite funny – practising.”