KEEPING Britain Alive: The NHS in a Day does what it says on the tin – a portrait of the NHS in October last year when 100 camera crews flitted across the UK to film the inner workings of the service.

The first episode investigates how it copes with the ever-increasing demands of obesity, old age and cancer.

In Birmingham, a matron deals with 130 patients in her clinical decision unit, while in Chichester, a patient’s weightloss surgery is interrupted because of a devastating discovery.

In Leeds, a 64-year-old man who’s had a stroke is relying on doctors using a revolutionary treatment to save his speech and movement.