Mazzy, Blinkz,
Quote from GASIL2001/4:
Once in the vicinity of the aerodrome (usually accepted as being within the ATZ or what it would be if it existed), all turns must be made in the circuit direction. Air traffic controllers, and only they, may issue conflicting instructions within an ATZ, but otherwise pilots must follow the rules. It is also important to know where everyone else is in a busy circuit.
Rgds,
TPK
