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.

It's a hectic start to the afternoon shift for Sister Benita, who's running the hub on her first week back from maternity leave. An ambulance arrives with 75-year-old Barbara, who was rushed in after collapsing in her garden, while Dr Josh Gemmill tends to 78-year-old former miner David, who has a large haematoma on his arm.