Psychological factors have consistently been demonstrated to be related to delayed/poor recovery in patients with chronic low back pain. Research conducted thus far to address these factors has yielded only modest results. This feasibility study aimed to address the limitations of prior studies such as delivery by non-experts and lack of individualised interventions by delivering an optimised behavioural intervention. The findings suggest that contextual cognitive behavioural therapy delivered by an expert psychologist is superior to physiotherapy alone for low back pain patients suffering from "fear avoidance".