"In a commercial setting, it would be proper to take account of the manner in which and the time at which persons acting honestly and reasonably would pay"
"if there is a bona fide dispute over proof of loss, interest will not be awarded against the insurer until the dispute has been resolved; 'until the claim has been presented, and he has investigated it, it is not fair to regard him as withholding payment'" citing Knoller v Evans (1936) 55 LL L Rep 40 and De Maurier v Bastion Ins. Co [1967] 2 LL Rep 550 and quoting from Law Commission Report No 88 (1978) section 72; and to Halsbury's Laws of England , 4th Ed; vol 25, para 203 ("