The practice was named after the father (Dr Kelso Watson) and uncle (Dr John Watson) of Dr Stewart Watson, who was one of the three doctors working in the practice in the 1980s.
There were two other GPs working in the practice at that time: Dr Alan Thorburn and Dr Cappil Joseph. Dr Mark Porcheret joined the practice in 1984 when Dr Thorburn retired.
The practice moved into the Park Medical Centre in 1986 having previously occupied the old stables of the end house on Bath Street.
After the move into the Medical Centre, the practice expanded greatly. From three GPs, one nurse and no manager in 1986, by 2012 the practice had seven GPs, one nurse practitioner, two nurses, one healthcare support worker, one practice manager, two deputy managers, 8 receptionists, 3 administration clerks, and 2 Secretaries.