Hi T1m
I agree with JohnR's comments, and will expand a bit on the "business judgment rule" defence, the rationale of which is not to penalise directors for legitimate mistakes in unsuccessful ventures
The business judgment rule (set out in section 180(2)) may provide a defence for directors whose conduct contravenes the statutory duty of care and diligence (set out in section 180(1)). Whether the defence is available would depend on your case's unique circumstances, so it's difficult to provide much guidance. As the obligations in section 180 are civil obligations, if the defence is not available, look to section 1317E as JohnR recommends
Finally, let us know if you'd like comment on how section 1317E operates