Breaking your lease may be the easiest option and you can do that with the landlord’s permission.
It’s when they refuse that you go to the Tribunal.
So the process would be:
1. Ask the landlord if they will approach the committee to do something about the noisy neighbours. It’s in their interest to do so as otherwise they will have a series of unhappy tenants.
2. If the landlord declines or their efforts fail, ask if you can break your lease because of the disruption.
3. If the landlord refuses, then you go to Fair Trading and NCAT.
Remember at stages 1 and 2 to impose a reasonable deadline for action.