Ambulance reveals the dilemmas faced by the London Ambulance Service as they are forced to bump patients down the queue so they can prioritise the sickest, deal with time-wasters and cope with the ever-present threat that a major incident is just a 999 call away

Episode two joins the staff in the nerve-centre control room on the night shift - when amongst the thousands of calls they receive, they also have to contend with hoaxers, frequent callers and run-away patients.

Tonight the London Ambulance Service brace themselves for a demanding weekend shift. As Londoners head out to play, the Ambulance Service often has to pick up the pieces. They need prepare for a torrent of cases, all with their own unique challenges.

In this second episode, one hour into the night shift with West Midlands Ambulance Service and the control centre is already on its third cardiac arrest. The highly-skilled MERIT team are administering care to a patient who has been stabbed and is bleeding heavily, the fourth stabbing victim the service has dealt with so far this Friday night.

In this episode, 71-year old Mick, who's already retired once but rejoined after missing life on the road, and his crew-mate Dave are dispatched to help a woman who called for pain in her tummy, but is actually having a massive heart attack and urgently needs the expertise of the specialist Cardiac Centre at Royal Stoke Hospital.