33 An assessment of the degree of recognition or discount which is justified in the circumstances of this case is not at all a straightforward matter and there is some scope for differences of opinion in the legitimate exercise of the sentencing discretion. For my part, I am not able to conclude that the reduction of some 4 years and 8 months, from the starting point of a sentence of 12 years imprisonment which her Honour fixed upon, was outside the appropriate range of sentencing discretion so as to manifest error on the part of her Honour. It may be thought by some to be toward the lower end of the appropriate range and that a more generous discount could have been justified, but even so there is, in my view, absent any clear and manifest error in the result. In my respectful view, a discount in the order of 50 per cent, which is contended for, would have been a quite generous recognition of the appropriate considerations in the particular circumstances of this case.