Nightingale enlisted in the British Army in 1995, and served as a sniper sergeant with the Special Air Service from 2001, undertaking tours of duty in Northern Ireland, Bosnia, Lebanon, Turkey, Iraq, Afghanistan, Syria and Libya.
Nightingale enlisted in the British Army in 1995, and served in the Duke of Lancaster's Regiment. He also served as a sergeant in the Special Air Service from 2001, undertaking tours of duty in Northern Ireland, Bosnia, Lebanon, Turkey, Iraq, Afghanistan, Syria and Libya.