A certain bedtime arrangement is the secret to King Charles and Queen Camilla's long-lasting marriage, it has been speculated.
The pair usually split their time between properties, with their London base at Clarence House, and unlike the late Queen, they don't live in Buckingham Palace or Windsor Castle.
It is usually customary for married members of the Royal Family to have separate bathrooms, it has been reported.
For example, Prince William and his wife Kate slept separately while living in Kensington Palace, while Queen Elizabeth and Prince Philip also slept apart.
It's even thought the late Queen and her husband slept in completely different wings of the building.
As for why Charles and Camilla retire to different rooms in the evening, it is apparently because of the King’s health.
The new monarch suffers from back pain and sleeping alone is believed to help ease those problems, it has been speculated.
Royal expert Joshua Rom suggested separate bedrooms because of the couple’s hectic schedules, and especially for their age, they prefer to relax separately.
However, it's not just at Clarence House the pair apparently sleep apart, but also when they're in the countryside.
King Charles has Highgrove Mansion and Camilla is said to have her own room there but does not usually spend time there, but at Ray Mill instead, where she has all her family close by.
Sleeping separately is also said to be the “secret” to the couple’s “long-lasting marriage”, according to reports.
It's thought this is a great stress reliever and allows them to have their own designated space, as well as a shared space.
One source previously told the Daily Mail: “[His Royal Highness] has a room with a double bed, decorated to his own taste, then Camilla has her own room with a double bed, decorated just the way she likes it.
“In addition, they have a shared bedroom with a double bed that they can use whenever they like. The arrangement suits them perfectly.”
More recently, body language experts revealed how a "rapid hand-flicking" gesture from the King showed a sign of impatience at his Scottish Coronation.
Charles was presented with the symbols of his authority in Scotland – the Crown, the Sceptre and the Sword of State – known as the Honours of Scotland during a day of pomp, pageantry and prayer in Edinburgh.
He was joined by his wife, Queen Camilla, as well as the Prince and Princess of Wales for the ceremony at St Giles Cathedral.
The service came eight weeks after Charles and Camilla were crowned in an ancient ceremony at Westminster Abbey, where the King made a pledge to "serve".
According to body language expert Judi James, all four royals appeared much more relaxed than at the service last May - but she noted Charles becoming impatient, especially when he arrived at the Cathedral.
