Started 1999 and in it's 20th Season. IMDB gives it a rating of 5.9. Not been watching it ourselves, but to be still running after all this time, Hospital Dramas seem popular
Most of the strong characters have gone now, Jac Naylor, Oliver Valentine, Zosia March, Mo Effenga, Essie and Raff di Lucca and Morven Digby. I know that they come and go but they seem to have all gone at the same time. The stories don't seem to revolve around the patients like they used to. I still enjoy it but not as much.