The London Air Ambulance has become the first in the UK to carry blood on board its aircraft. From today, the medical teams will be able to carry-out blood transfusions at the scene of an accident - increasing patients' chances of survival.Helena Carter reports.
More top news
London Ambulance Service has more paramedic job vacancies than anywhere else in England.
Hundreds of people march for more affordable homes and control private rents in London.
Police proposals suggest that all frontline police officers should have the option of arming themselves with Tasers.