Elizabeth II – the nation’s longest reigning monarch – is marking 69 years on the throne today (February 6), meaning she is just one year away from her Platinum Jubilee.

The coronavirus pandemic has forced a break in the Queen’s long-held personal tradition of reflecting on the sad anniversary of her father’s death and the start of her reign at Sandringham House, in Norfolk.

Instead, the monarch, 94, will be at Windsor Castle, where she and the 99-year-old Duke of Edinburgh are spending lockdown, looked after by a reduced household of staff dubbed HMS Bubble.

READ MORE: The Queen and Prince Philip return to Windsor Castle for lockdown

Here is a selection of pictures of the monarch at Windsor over the years, as she reaches the anniversary of her accession.

File photo dated 13/10/40 of Princess Elizabeth (left) and Princess Margaret on a pony cart in the garden of their wartime country residence in Windsor. Picture: PA

File photo dated 13/10/40 of Princess Elizabeth (right) and Princess Margaret after broadcasting on Children's Hour from Windsor Castle. Picture: PA

File photo dated 210452 of Queen Elizabeth inspecting Grenadier Guardsmen at Windsor Castle, the first ceremonial parade of the Queen's reign. Picture: PA

File photo dated 21/04/68 of the Royal Family in the gardens at Frogmore, Windsor. Picture: PA

Queen Elizabeth, the Prince of Wales, the Earl of Wessex, the Duke of York and the Princess Royal listening to the Duke of Edinburgh on a bridge in the grounds of Frogmore, Windsor, on 21/04/68. Picture: PA

File photo dated 06/02/77 of Queen Elizabeth, accompanied by the Queen Mother, the Duke of Edinburgh and Prince Edward, at the Royal Chapel in Windsor Great Park to commemorate 25 years on the throne. Picture: PA

Queen Elizabeth during a video call from Windsor Castle with members of the Armed Forces based across the globe. Picture: Buckingham Palace/PA Wire

File photo of the Queen and Prince Philip in the Quadrangle of Windsor Castle. Picture: Steve Parsons/PA Wire

File photo dated 31/05/20 Queen Elizabeth riding Balmoral Fern in Windsor Home Park. Picture: Steve Parsons/PA

Buckingham Palace handout photo of the Queen speaking to Prime Minister Boris Johnson from Windsor Castle for her weekly audience during the coronavirus.

The Queen during a virtual audience from Windsor Castle to receive the High Commissioner of New Zealand, Mr Bede Corry, who was at Buckingham Palace. Picture: Dominic Lipinski/PA

File photo dated 17/07/20 of Captain Sir Thomas Moore receiving his knighthood from Queen Elizabeth during a ceremony at Windsor Castle. Picture: Chris Jackson/PA

The Queen recording her annual Christmas broadcast last year at Windsor Castle. Picture: Steve Parsons/PA

Her Majesty stands in the quadrangle at Windsor Castle to meet and thank members of the Salvation Army and local volunteers and key workers from organisations and charities in Berkshire, for the work they were doing to help others during the pandemic and over Christmas. Picture: Glyn Kirk

Queen Elizabeth talking Captain Sir Thomas Moore and his family after awarding his knighthood during a ceremony at Windsor Castle. Picture: Chris Jackson/PA

The Queen talks with the Duke and Duchess of Cambridge in the quadrangle at Windsor Castle. Glyn Kirk PA