Clarence House has tweeted pictures of Prince Charles using an Oyster card to pass through the ticket gates at Farringdon Station.
The Prince of Wales and the Duchess of Cornwall are visiting the station to mark the 150th birthday of the tube.
The royal couple were presented with special commemorative Oyster cards.
Nicholas Okwulu, a Community Enabler for a local organisation, has previously organised Big Lunches in Brixton and Peckham and runs projects that are socially inclusive and aim to improve the lives of people in Peckham.
Today's event brought people together from three different estates and had a significant and lasting impact on the community.
This event was funded by the Department for Communities and Local Government. Community events such as this Christmas celebration are successful in bringing different people together in the wider Peckham community, particularly those who may be isolated.
Margaret Cox and other residents from the Hollybush Estate in Tower Hamlets are putting on a Christmas event for their community, following the success of their Big Lunch this summer.
The residents are delivering hampers to the older residents on the estate, which will include fresh vegetables from their allotment, jam made using fruit from their orchard, Strawberry Fields, and other festive goodies.
The Prince of Wales and The Duchess of Cornwall have visited community volunteers at the Hollybush Estate, Bethnal Green and the Everlasting Arms Ministry, Peckham.
Rocky Gardens on the Hollybush Estate is part of the Capital Growth scheme and provides free plots to residents to grow their own produce. Margaret Cox is a full-time volunteer in Tower Hamlets and works closely with local groups, voluntary organisations and schools.
Through her work, the estate now has a local nature reserve and 79 community growing spaces. These improvements have transformed the area and helped to alleviate the anti-social behaviour.
The Duchess of Cornwall will visit Battersea Dogs and Cats home later.
As well as a tour of the site, Her Royal Highness will meet staff and volunteers joined by her own dogs which were adopted from the shelter.
The Duchess of Cornwall has been forced to cancel a number of engagements this week after developing a severe ear infection and sinusitis, Clarence House has said.
Camilla was due to attend the Classical Brit Awards at the Royal Albert Hall on Tuesday night and a series of events in London on Wednesday but will now miss them because of illness.
It is thought the Duchess has sought medical advice and been advised not to fly down from Scotland where she has been spending the summer with the Prince of Wales.
A Clarence House spokeswoman said: "The Duchess of Cornwall has developed sinusitis and a severe middle ear infection.".
The Prince of Wales and the Duchess of Cornwall joined Battle of Britain veterans and their families at a service of thanksgiving.
A Spitfire and a Hurricane flew high above London's Westminster Abbey to commemorate the battle, one of the turning points of the Second World War.
Some 544 Royal Air Force pilots were killed in the bitter struggle to save the UK from invasion.Of the events, Winston Churchill famously declared: "Never in the field of human conflict has so much been owed - by so many - to so few".
The annual service marked the nation's gratitude for the pilots and aircrew of the RAF who prevented Germany from gaining air superiority in the summer and autumn of 1940. The Battle of Britain Roll of Honour was escorted to the Sacrarium by airmen who had fought in the battle.
The Prince of Wales and Duchess of Cornwall posed for a photo with Torchbearer's Jay Kamiraz and Scott Moorhouse as they carry the Olympic Flame on the Torch Relay leg between Enfield and Haringey.