Prince Philip is reportedly keen to have a “low key” 99th birthday next week and doesn’t want anyone to make a fuss.

Owing to coronavirus lockdown measures, the Duke of Edinburgh's children won’t be able to drop by Windsor Caste next Wednesday.

Philip has been in isolation at Windsor Castle with The Queen since before Easter.

On June 10, Philip’s birthday will be marked by lunch with The Queen and Zoom and phone calls with family and friend – including Prince Charles in Scotland, the Duke and Duchess of Cambridge in Norfolk and Harry and Meghan in Los Angeles.

A small number of birthday wishes will be released on social media by family members.

The Duke of Edinburgh's children won’t be able to drop by Windsor Caste next Wednesday

However, a source told the Daily Mail the mantra is very much “low key”, adding: “He’s not one for fuss, as you know.”

Buckingham Palace was to mark the occasion publicly but it depends “on how His Royal Highness Feels”.

The Queen was yesterday pictured for the first time since lockdown began in March – riding one of her faithful ponies through grounds of Windsor Castle.

Her Majesty donned a pink floral headscarf as she took a gentle amble around the lush greenery of her favourite estate on Sunday.

She opted to saddle up her 14-year-old Fell Pony called Balmoral Fern for the occasion.

Philip has been in isolation at Windsor Castle with The Queen since before Easter

The 94-year-old regularly rides in the grounds of the Royal Family's Windsor Castle and has been a passionate horse lover and breeder of thoroughbred racehorses throughout her reign.

She was pictured smartly dressed in a tweed jacket, jodhpurs, white gloves and boots, enjoying the sunny weather as the country begins to ease lockdown restrictions.

The last public picture of the Queen was taken as she was driven away from Buckingham Palace to her Windsor Castle home to self-isolate with Prince Philip, 98, on March 19.