In 1987, Rees-Jones enlisted in the 1st Battalion of the Parachute Regiment, served one tour of duty in Northern Ireland and was awarded the General Service Medal.
1987 verpflichtete sich Rees-Jones beim 1st Battalion vom Parachute Regiment, wo er seinen Dienst in einem Einsatz in Nordirland leistete, und die General Service Medal verliehen bekam.