In November 2008, 18-year-old Laura Williams from Shrewsbury made medical history by becoming the youngest mother in the world to give birth to conjoined twins. Laura and her husband Aled suddenly found themselves headline news when their twin daughters - Hope and Faith - were born in London.

Channel 4 cameras were granted exclusive access to the family from the moment the two girls - joined from shoulder to waist - were delivered by Caesarean section. The twins were immediately transferred to the world-renowned Great Ormond Street Hospital, where a team of specialists pushed the boundaries of medical science in an attempt to keep the girls alive.

This moving Cutting Edge film follows the girls' fight for life step-by-step alongside their parents. While the world's media camp outside the hospital, the film reveals the touching human story of two young parents willing their daughters to live. The film includes the girls' christening, held minutes after their delivery; the drama of the decision to bring forward the ten-hour operation to separate the twins, which is forced on the surgeons; and the aftermath of the surgery.

As Hope loses her fight for life, the family are left torn as they try to support the surviving Faith while mourning her lost sister, relying on each other to get through the gruelling and exhausting events. Meanwhile the hospital have to manage a worldwide story.

Britain's Conjoined Twins: Hope and Faith is the remarkable story of two very ordinary young people doing their best to cope with an extraordinary event and their decision to try and let their daughters live. And despite the tragedy of the situation, Laura and Aled's positive attitude and unswerving devotion to their daughters is uplifting.