i dont thin k you get to chose what is on and not on your medical record ... confidentiaity applies, but not to the detriment of sharing information amongst medical staff. Eg where i work, if a psychologist sees someone, they will write to the gp at the end of the sessions with a summary (which could include opinions and facts)
It was poor form on the part of the cpn not to inform you they were sharing this info, or you could have made it clear there wre bits you didnt want sharing.
i think its especially fraught with difficulties when regards to psychiatric assessments, which may include either things the patient is unaware of or things to keep them safe (ie if you had attempted suicide, it would be reasonable to share that with the gp)