PATTENSEN, GERMANY - APRIL 11: Prince Ernst August of Hanover attends the presentation of the Royal Crown of Hanover at Schloss Marienburg palace on April 11, 2014 in Pattensen, Germany. The city of Hanover is scheduled to hold a celebration for the British Royal Family to mark the '300-year personal union' in May and June this year. Prince Andrew, Duke of York, is expected to take part in the celebrations in June. (Photo by Alexander Koerner/Getty Images)

PATTENSEN, GERMANY - APRIL 11:  Prince Ernst August of Hanover attends the presentation of the Royal Crown of Hanover at Schloss Marienburg palace on April 11, 2014 in Pattensen, Germany. The city of Hanover is scheduled to hold a celebration for the British Royal Family to mark the '300-year personal union' in May and June this year. Prince Andrew, Duke of York, is expected to take part in the celebrations in June.  (Photo by Alexander Koerner/Getty Images)