How do i take 206 door cards off?

I have a peugeot 206 t reg, the lock has been makin a weird buzzing noise when i unlock the car but doesnt do it when i lock the car. its central locking, i need to take the door card off but for the life of me dont know how to as the screw in the handle just turns n isnt losening and there are no other screws.

Its the rear passengers side.