GLOUCESTER, UNITED KINGDOM - JANUARY 06:  Ambulances arrive outside the Accident and Emergency department  of Gloucestershire Royal Hospital on January 6, 2015 in Gloucester, England. The hospital is one of a number in the UK to have declared a major incident due to high demand in it's A&E departments. Figures released today suggest that the NHS in England has missed its four-hour A&E waiting time target with performance dropping to its lowest level for a decade.  (Photo by Matt Cardy/Getty Images)