The GP unit we go to is attached to the local hospital, and has a series of interns doing their GP term seeing anyone who wants an urgent appointment - the two GPs that are there full time are there to supervise the interns. You can see either of them if you are willing to make an appointment far enough in advance.
The unit specialises in children's medicine, and if you have a child with a need to visit you will get an almost instant appointment.
The usual doctor we see is one of the two supervisors - very good bed side manner - hardly ever prescribe drugs (which I think is a good thing).
The best thing - they are on call - great to be able to see your own doctor at 10pm on a Sunday night
It helps that the clinic is only 5 minutes drive from home too.