WINDSOR, ENGLAND - APRIL 21: The Queen, accompanied by The Duke of Edinburgh, The Prince of Wales and The Duchess of Cornwall, lights a beacon to celebrate Her Majesty's birthday on April 21, 2016 in Windsor, England. The Queen lit the principal beacon which will set in train a series of over 1,000 beacons across the country and worldwide. Beacons large and small, either specially built gas-fuelled structures or simple bonfires, will be lit across the country to mark The Queen's 90th Birthday, and individuals have been asked to attend a beacon - lighting event in their area, hosted by their local authority. (Photo by Arthur Edwards - WPA Pool/Getty Images)
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