To donate head to the Royal British Legion's website.
The Duke of Edinburgh and Prince Harry carried out their first joint engagement as they opened the Field of Remembrance at Westminster Abbey.The first Field of Remembrance was held in the grounds of Westminster Abbey in November 1928, making 2013 the 85th year.
Remembrance crosses are provided so that ex-servicemen and women, as well as members of the public, can plant a cross in memory of their fallen comrades and loved ones.
Organised and run by the Poppy Factory, the Field is opened for 11 days each year, from the Thursday preceding Remembrance Sunday through to the following Sunday
Pipers from the Epping Forest Pipe band entertained travellers at terminal 5 at Heathrow airport today while soldiers helped push the total collected today closer to the target on one million pounds.
"Kate asked what kind of music I'd been playing," Corporal Steve Johnson, an RAF recruitment officer from Newcastle, who is busking at Tube stations across London told the Press Association. "She asked me to play but then said don't because it's too busy.
"Kate was more interested in the music, while William was more concerned with the day itself and how the appeal was going. Lots of people are ecstatic to see them."
William and Kate were introduced to The Poppy Girls at Kensington Palace this morning, who have produced the appeal's official single The Call (No Need To Say Goodbye), featuring 17-year-old Charlotte Mellor, who was on crutches after a fall.
London Poppy Day organisers are aiming to raise more than £1 million today.
All funds will go towards the national Poppy Appeal fund-raising target of £37 million to allow the Royal British Legion to carry out its vital work.
The nation's biggest armed forces charity spends £1.6 million every week in direct welfare support and answers more than 170,000 calls for help.
RBL Ambassador Barbara Windsor says she's hopeful Londoners will exceed the target of £1 million.
The Duke and Duchess of Cambridge surprised hundreds of commuters today as they joined poppy sellers at a London Tube station.
The royal couple travelled on a 1960s Routemaster bus to High Street Kensington station where they met military personnel and volunteers supporting London Poppy Day.
Barbara Windsor launched the London Poppy Appeal in Covent Garden today, before heading off on the 1960s Routemaster bus to meet William and Kate - the Duke and Duchess of Cambridge.