London's Air-Ambulance became Britain's first emergency service to carry blood whenever they're called to an accident. Experience has shown that when soldiers have been seriously injured in battle, an immediate blood transfusion can increase their chances of survival.
Phil Bayles reports now on how the same pricinple will now be applied around the capital.
More top news
Non-league club Sutton United take on Arsenal in the fifth round of the FA Cup this evening - but how do the two sides match up in numbers?
Detectives in Islington continue to appeal for information and witnesses after a couple out watching football were punched in the face.
London is among the worst cities in the world for congestion, according to a new study.