On the eve of Article 50 being triggered, Dispatches investigates the impact that Brexit is having on Britain's Health Service. Following the busiest winter on record, our hospitals are under pressure like never before. To make matters worse, the NHS is facing the largest nursing shortage in recent times: more than 20,000 vacancies nationwide. Morland Sanders investigates the scale of the looming staff crisis on our wards. He discovers NHS chiefs unable to recruit new staff from Europe and uncovers evidence that the Government's attempts to boost home-grown NHS staff recruitment are failing to fill the gaps.