Run, Hide, Tell: Firearms and Weapons Attack

In the UK the Police Service and partners work very hard to keep us safe from the threat of guncrime. Firearms and weapons attacks are thankfully extremely rare, but we must always know to do stay safe. What would you do if you came under fire or heard gunshots at work or in public? Should you stay and hide, or run for the nearest exit? Would you know what to do to stay safe?