“It is impossible not to have sympathy with the solicitors in circumstances where a retrial proves to be longer than the original trial and throws up significant new issues during its course. It cannot have been the intention of the regulations to reward such a hearing with a fee of only 25% of the original hearing. Such reduction must assume that there will be rather less for the litigator to do in the second trial since much if not all of the preparation from the first trial can simply be carried over into the second hearing. Where a trial does become significantly more involved than the first one, that assumption is obviously proved false.”