The other terms, exclusions and conditions of this Policy remain unchanged.
If Ferrcom had accepted such a policy and had paid the additional premium, nevertheless the endorsement would have excluded liability for the loss that occurred when the crane overturned. Mr. Hughes, a Senior Motor Underwriter for Commercial Union, gave evidence that he had never waived the ME35A endorsement in a policy to cover a registered mobile crane and he added:
In determining whether or not to insist upon the endorsement, I would have taken into account the amount of insurance which Commercial Union had for the particular insured, their past years claims experience and most important the support and amount of insurance business placed with Commercial Union by the particular broker.
The standing of Mr. Green of Inbush with Commercial Union was such that, as Handley J.A. found, "[the] Court can safely conclude that after 11 May, Mr. Green would not have secured cover from the appellant for this crane without the endorsement" [3] . However, as Mr. Green was leaving the industry, Ferrcom progressively engaged the services of Hemms Cassell & Associates Pty Ltd from 4 July 1987, and that broker's standing with Commercial Union was such that Mr. Hughes would "reluctantly have agreed" to waive the endorsement had the waiver been sought by Hemms Cassell. If the endorsement had been waived, an additional premium of $8757.13 would have been payable and the excess would have been increased by $800. Giles J. found that "the prejudice to [Commercial Union's] interests as a result of the failure of Ferrcom to notify the registration of the crane was not that it remained on risk in relation to damage to the crane from overturning, but that it remained on risk without having received the additional premium or imposed the increased excess of which Mr. Hughes spoke. That is the real extent of its damage and the real measure of its damages." In the Court of Appeal, however, that view was rejected. The hypothesis adopted by Kirby P. and Handley J.A. was that Mr. Green would have continued to act for Ferrcom in the obtaining of insurance for the crane and that Commercial Union would not have granted cover except on the terms of the ME35A endorsement. That hypothesis was strengthened by the fact that, in July 1988, Hemms Cassell sought renewal of comprehensive insurance of two registered mobile cranes from Commercial Union for Ferrcom without requesting the waiver of the endorsement. Renewal was granted subject to the endorsement. Their Honours assessed the prejudice to Commercial Union resulting from Ferrcom's failure to notify the registration of the mobile crane by adopting the hypothesis that Commercial Union would have cancelled the policy and would not have accepted any further risk of damage to the crane by overturning. The evidence of Mr. Hughes, accepted by Kirby P. and Handley J.A., demonstrated that no other hypothesis was reasonable. It is by reference to that hypothesis that the court has to determine the amount "that fairly represents the extent to which [Commercial Union's] interests were prejudiced as a result of" Ferrcom's failure to notify the registration of the mobile crane.
1. (1991) 22 N.S.W.L.R., at p. 417.