Buckingham Palace says it's 'deeply disappointed' that film apparently showing Queen Elizabeth II performing a Nazi salute has been made public.

She was seven when the home video, which has been obtained by The Sun, was shot in 1933.

WORLD EXCLUSIVE: Secret 1933 film shows Edward VIII teaching Nazi salute to Queen.See it FREE http://t.co/3m8L9qZ5Ju pic.twitter.com/vdS9B3fJ7l

— The Sun (@TheSun) July 18, 2015

She was playing with her uncle, who became King Edward 8th.

But historian Kate Williams says it should be viewed in context.