You are required to Turn left off Trig Road into a side street / driveway and do a U-Turn.
You will need to move into the cycle lane and slow down before turning.
If you slow down on the main road you will be holding up traffic.
You can use the bus / cycle lanes for turning left as long as you are in there for less than 50mtrs
Driving Test Tips and Advice
Learn from what other have done wrong and try not to repeat them.