Just to fill in a bit more detail, the Daily Mail had
this article, which is (I think) the one that peterprobe is referring to.
A couple of quotes from the article:
A student was left dying by the side of a road after an air ambulance 20 miles away was refused permission to cross a county boundary, it has been revealed.
Rebecca Wedd, 23, had to wait 42 minutes for medical help after she was hit by a car as she walked with a group of college friends to a summer ball.
Police arrived in seven minutes, but it was almost three quarters of an hour after the 999 call when paramedics finally appeared.
Rebecca Wedd, 23, died after an NHS trust took 42 minutes to dispatch an ambulance to her
The national target for answering such a call is eight minutes.
Miss Wedd was eventually flown to a nearby hospital but died of her injuries the following day.
It has emerged that an air ambulance crew three minutes away from the scene of the accident was initially refused permission to answer the call from the A433 in Gloucestershire, because it meant crossing a county boundary from Wiltshire.
The emergency controller contacted the Wiltshire Air Ambulance after the accident but was told the helicopter could not fly outside the county at night.
This was said to be part of a pre-existing arrangement between WAA and Wiltshire Police, which shared the helicopter.
The controller then contacted Wiltshire Police directly and persuaded them to bend the rule because of the emergency.
Permission was given and the aircraft was finally dispatched at 12.02pm, and arrived at the scene at 12.05am - 43 minutes after the initial 999 call.
The report also highlighted other failings by the Great Western Ambulance Service that night.
A nearby ambulance dealing with a less urgent call was not diverted to Rebecca's aid and no ambulances were available in nearby Cirencester because of staff sickness.