Series meeting the everyday heroes who keep Britain safe, battling the unexpected challenges that unfold with each passing season.

Matt Allwright and Julia Bradbury go behind the scenes at the largest trauma centre in the Midlands as the team field the rise of sporting injuries in spring. Plus a report on the team at the largest blood processing facility in the world and the volunteer blood bikers keeping the NHS supplied with almost a million litres of blood. As the MET police launch their Spring offensive we're behind the scenes of the custody suite. Show less