 What does the study involve? Potential participants will be identified by clinical staff who will refer them to the research team. In primary care, the GP practice will send trial invitation letters to eligible patients in the post. Patients who give their consent to take part in the study will complete a number of questionnaires asking about their symptoms and use of health care services, and about their thoughts, feelings, and beliefs related to their PPS i.e., baseline. This will take approximately 1.5 hours. After this research assessment, half of participants will be randomly assigned to the treatment arm i.e., CBTSMC, or to the control i.e.,SMC arm. Participants in the treatment arm will receive 8 individual sessions of CBT weekly or fortnightly sessions. The therapy aims to help the patient develop an understanding of the relationship between cognitive, physiological and behavioural aspects of their problem; to understand factors that may be maintaining the problem and to learn how to modify their behavioural and cognitive responses in order to prevent ongoing symptoms and disruption to healthy living. Participants in the SMC group will receive usual care within the clinicGP practice. 