An NHS campaign group posts on social media to celebrate the organisation's overseas workers, but there's a backlash from people who think we should have more British-born doctors and nurses. Would the NHS collapse without these foreign workers? We find out how many are employed and ask whether there could ever be enough British-born staff to replace them. The NHS has long relied on foreign workers - we go back to the organisation's beginnings. Plus, where does the NHS fit into the UK's broader immigration row?

Presenter: Adam FlemingProduction team: Simon Tulett, Lucy Sheppard and Bob HowardStudio manager: Andy MillsProduction coordinator: Janet StaplesEditor: Penny Murphy