A 55-year-old man from Bath who was being treated at the Royal United Hospital has gone missing.
Sean Williams was an inpatient at the hospital and was last seen there at 9pm on Thursday 28 March.
Police believe he is driving a black Mercedes C-Class, with the registration G2 BME.
Sean is white with long grey hair and was last seen wearing a blue Karrimor jacket. Police say he has links with both Dorset and Plymouth.
Avon and Somerset Police are asking any members of the public to get in touch if they see Sean or his vehicle.