The Duchess of Cornwall will visit the Trinity Hospice in Clapham later.
Trinity Hospice is the oldest hospice in Britain, and provided care to more than 2,500 people with a range of terminal illnesses last year.
Over 450 of those patients were treated at the charity's inpatient center in Clapham.
The Hospice receives just a third of its income from the NHS, and needs to raise more than £7 million every year.
During her visit to the Ebony Horse Club, the Queen met our Senior Correspondent Ronke Phillips who is patron of the charity. She's seen first hand some of it's work and how it's changed the lives of some of London's children, including three of girls who took part in today's event.
The Duchess of Cornwall has given the Queen a tour of an inner city riding club which she has been supporting as President. The Ebony Horse Club in Brixton was created in 1996 to give disadvantaged children and teenagers access to horses and riding.
The Duchess of Cornwall joked about the cost of Coleen Rooney's wedding dress at a charity event today.
Camilla was speaking to charities about the importance of financial education at an event at Toynbee Hall, Tower Hamlets.
James Wilson, education officer at the charity, said: "The particular slide she spotted was Coleen McLoughlin, Wayne Rooney's wife.
"The question is 'how much does her wedding dress cost?' and it works out somewhere in the region of £5million, once she paid for it to be hand made and the diamonds."So she joked about just learning about being more sensible with your money."
The Duchess then visited the Bethnal Green branch of The London Community Credit Union, a not-for-profit community owned bank, which offers low cost credit personal loans and free money advice.
A Clarence House spokesman said Camilla was interested in the work of communities helping each other at a grassroots level, and in Credit Unions' financial awareness work.
Prince Charles looked right at home, inspecting a haunch of wild boar and sampling luxury olive oils.
A farmer himself, and an advocate of organic food, he took special interest in the produce being sold at many of the stalls.
But, it looked rather more incongruous when Charles started sipping on a cup of "builder's tea".
The Prince normally has his tea without milk and with a spoonful of honey, but he ordered one with two sugars and as strong as you can make it from cafe-owner Maria Moruzzi.
Prince Charles and the Duchess of Cornwall paid a visit to one of London's oldest, most famous food markets today.
The royal couple were in Borough Market to meet traders at the Old Hall.
It was forced to close two years ago, because of rail construction work, but the stalls are now back in business, as Liz Wickham reports.
The Duchess of Cornwall was presented with armfuls of gifts from traders, as she toured Borough Market.
Florist Sharon Crane, 45, whose business opened today, gave her first bunch of flowers to the Duchess for free.
Afterwards she said: "I told her 'I'm giving you a bouquet of flowers in case your husband forgets' and she said she was hoping to get some."
She was also presented with a massive chocolate heart, decorated with the words "with love from Borough Market".
But it seems Charles is having a rather less romantic Valentine's day. When asked by David Ruane, a worker from a nearby pub, if he'd received a card, he rolled his eyes and said: "No, I don't think so."
The Prince of Wales waved away the offer of a free chocolate brownie, as he re-opened Borough Market today, saying that he'd given them up for Lent.
But the Duchess of Cornwall happily accepted a Valentine's gift of a large chocolate heart decorated with the words "love from Borough Market".
She told chocolatier Hayleigh Bazelya: "I will have no problem munching my way through that."
The Prince of Wales and The Duchess of Cornwall have officially re-opened Borough Market.
Most of the stalls had to move out two years ago, because of rail construction work, but they're now back in business.
There is flash photography throughout Sharon Thomas' report.
Today's journey was the first ever joint tube trip for Prince Charles and the Duchess of Cornwall.
Although both of them now qualify for an over-60s Freedom Pass, they were presented with commemorative Oyster cards topped up with £10 credit for the one stop journey from Farringdon to King's Cross.
A brand new train was used, which arrived at the platform empty. But members of the public boarded along with the royal couple - separated only by a group of policemen standing further down the carriage.
When the royal couple arrived at King's Cross they were taken to "Platform nine and three quarters", a Harry-Potter themed attraction in the station.
In the books by JK Rowling, the "Hogwarts Express" steam train leaves from a secret platform, which witches and wizards reach by pushing a trolley through a wall.
But Charles and Camilla remained firmly in the land of the "muggles" or non-wizards.