It's mid-afternoon at Barnsley Casualty and the department is already gridlocked. Sister Jane urgently needs to move patients out of A&E, as more continue to arrive. To add to the pressure there's a shortage of porters, whose role is crucial when it comes to patient flow.

An 87-year-old, Ralph, who is struggling to breathe, is blue lighted in. Doctor Taylor prepares Resus with student Doctor Ewan. Ralph has come in with a complex set of health issues and Doctor Taylor needs to run a series of urgent blood tests, so that he can determine the cause of Ralph's critical condition.

Karina walks in with husband Darren after dislocating her shoulder for the fifth time. She's only just got over a dislocation in the same place after falling down a flight of stairs on holiday. Repeated dislocations could mean there's something seriously wrong, so Emergency Nurse Practitioner Darren needs to work quickly to try and relocate the joint.

Sallie, an 83-year-old, is rushed in after having a fall at home. Sallie's sent to cubicle 8 with her grandson's girlfriend Katie. She's recently had numerous falls, which could be the sign of a more serious underlying condition, so Doctor Amber Mitchell comes straight to assess her.

In Cubicle 7, Doctor Phil Taylor assesses Pui, who has back pain. He examines her to feel if there is any swelling of her kidneys. She's in agony and Doctor Taylor suspects she may have a kidney stone, so orders an urgent CT scan.

Over in Paediatrics, Nurse Ellie collects the next patient from reception. Harry has come with his mum Rebecca after an incident at nursery has left him with a large laceration inside his mouth.

The IT systems have failed, causing chaos, but Casualty still need to treat a motorcycle courier who's had a head-on collision, and a man with severe abdominal pains.