Surely the pilot could vary the pattern that is flown round the circuit?
The rectangular pattern (illustrated above) is standard throughout the world. Introducing a local variation would compromise safety. When practising take-offs and landings the aircraft takes-off, climbs to 500ft above ground level (AGL) and then turns 90⁰ before climbing to 1,000ft (AGL) and making a further 90⁰ turn. It then flies parallel to the runway until the runway appears to be 45⁰ behind the aircraft. It then turns 90⁰ and descends before making a further 90⁰ turn to line up with the runway.