Queen Elizabeth II, Britain's longest-reigning monarch, is marking the 66th anniversary of her accession to the throne today.

Eastern Daily Press: How the news was reported. Picture: Archant libraryHow the news was reported. Picture: Archant library (Image: Archant)

As is tradition, the Queen spends Accession Day (February 6) in private in Sandringham Estate, where her reign began after her father, King George VI, died of lung cancer in 1952.

When her father died, the then-Princess Elizabeth was in Kenya with the Duke of Edinburgh. She left Kenya a princess and returned to the UK as a Queen at the age of 25.

Eastern Daily Press: The Queen at West Newton attending a church service. Photo: Stephen BiddleThe Queen at West Newton attending a church service. Photo: Stephen Biddle (Image: (c) copyright newzulu.com)

On February 8, Elizabeth II was formally proclaimed Queen in St James's Palace, Westminster.

Accession Day normally marks the end of her winter stay in Norfolk before she heads back to London via train from King's Lynn railway station.

She made her last Sunday church service in Norfolk over the weekend, where she was greeted by more than 200 well-wishers in West Newton.