Doc Martin

Editing
The editing speeds up a bit when the leak happens to build up a bit of tension for the viewer. The camera shots stay on the screen for a longer amount of time when Martin and Brading are talking which shows that there is not much tension in this scene, this can signify that they are comfortable with each other.
Sound
There is diegetic sound of seagulls which shows that they're by the sea, this is a good and subtle way to show where Doc Martin is filmed. Soundtrack plays strings when Martin sees the teacher in the school which builds up tension and makes the viewer inquisitive as to why this happens, drawing attention to the TV programme. There is no soundtrack when Martin and Brading talk which shows there is no tension and also shows that they may be comfortable with each other, drawing attention to their relationship. When Martin takes the dog to the police station and leaves the plumbers, the soundtrack is played and it's cheerful; this is humorous towards the Doctor because Martin is stressed out and everyone is always calm.
Camerawork
There is an establishing shot for the school just before Martin looks at the teacher, this is the only establishing shot in the extract which may signify that the school is the only new location and the viewers know the other locations so there is no need for establishing shots for anywhere else. When Martin first has an encounter with the police officer, the camera pans up the police officer to show what he's doing; this is a good technique to use because the camera shot stays a medium shot but it also shows his full body. The camera pans towards the dog which tells the viewer that the next bit of the sequence will be focused on the dog; when the camera pans towards the dog, it gets the viewer to question what is going to happen next. 
Mise en scene
Martin uses a jumper for a dog leash and he fixes a leak the the plumbers could not fix, these actions show that Martin is a handy man and he can make good out of any situation. One of the plumber is fat and is eating which signifies that he is useless and shows gluttony. the room is full of boxes and it's lit by dull natural lighting; because of this, it shows that the plumbers aren't professional and that Martin is more in control than them.