Police, fire and ambulance services in London are celebrating. Today is the first #AwesomeMovementDay which celebrates London’s 999 services and the work they do in their communities.
London's Air Ambulance
London's Air Ambulance has been operating in the capital for 30 years.
A pilot with the charity reveals what it is like to rescue lives with the service.
The charity is celebrating 30 years of working in the capital.
The Duke of Cambridge has been named as patron of London's Air Ambulance Charity's 30th Anniversary Campaign ahead of a visit to the service.
The campaign aims to highlight the charity's vital work delivering life-saving treatment across London, and raise support for the development of new facilities.
William, a former pilot for the East Anglia Air Ambulance, will meet emergency responders during the visit to the Royal London Hospital in East London to mark the anniversary.
Jonathan Jenkins, chief executive of London's Air Ambulance Charity, said: "Through his support, we aim to raise awareness of the life-saving work carried out by us and by air ambulances across the UK.
"Our crew face significant challenges when delivering our rapid response and cutting-edge medical treatments in London.
"Through funds raised in our 30th year, we plan to improve our facilities to ensure we can respond even faster, enhance our training and ensure our crews have the facilities they need for their mental health and wellbeing."
Medics and a former patient take on a gruelling Sahara race to raise funds for London Air Ambulance.
The London Air Ambulance was called out five times a day last year, according to official statistics.
The 24/7 service, which delivers advanced trauma treatment to critically injured people in London, treated 1864 patients in 2016.
Westminster, where last months terrorist attack on Parliament took place, was the most frequent destination for the charity's two helicopters - with 123 patients treated.
The air ambulance, which is mostly funded through charitable donations, costs £8.7 m per year to run and can get to a hospital from anywhere in London within 11 minutes.
Road traffic collisions, stabbings and shootings accounted for 60% of the helicopter crew's work.