Career
Born in Haverfordwest, Turnbull is a fluent Welsh speaker. In June 2014 Turnbull joined the Cardiff Blues from the Scarlets. Turnbull has represented Wales at U18, U19 and U20 levels.
He has participated in two Institutional Review Board U19 World Championships, He was in the Wales U20 squad for the 2008 Under-20 Six Nations and JWC. He was named in the preliminary squad for the 2011 Rugby World Cup but was ultimately left out of the final squad.