really, you would never make a right turn in a left hand pattern? ever?
Never say never, Sky.
The rule says all turns must be to the left, but in an emergency avoiding a collision takes presedence.
Other reasons to turn right in a left circuit might include overtaking, or simply leaving the circuit.
Aircraft shouldn't overtake others in the circuit, and aircraft leaving the circuit should either climb straight ahead out of the circuit, or follow the circuit around until they are facing the direction they want to go.
MJ