Background
Liddell was born in Murton, County Durham.
Liddell was born in Murton, County Durham.
He played football for Yorkshire Amateur and as an amateur for South Shields, then turned professional when he moved to in 1920. He spent the whole twelve years of his professional playing career at the club, for whom he made 345 appearances as wing half or full back in all competitions, and played in the 1931 Final. When manager Leslie Knighton left for Chelsea in 1933, Liddell succeeded him.
He remained in charge while the club retained their top-flight status, leaving the job at the end of the 1938-1939 season when the club were relegated.
During his six-year tenure he selected 70 different players for first team duty.
He was described as a powerful defender who read the game well and was positive on the ball.