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
Police who want to question a man following the deaths of two of his relatives believe he may be in London or the surrounding area.
A sea of tweed snaked its way through London today as the most dapper among us donned their finest and got on their bikes.
A protest is being held today against the closure of gay pub The Black Cap in Camden.