"2 The authorities are now well established and I do not intend to repeat them. There is largely, if not entirely, an overlap between what both counsel are putting forward as the appropriate basis: cases such as Excelsior Commercial & Industrial Holdings Ltd v Salisbury Hammer Aspden & Johnson (a firm)[2002] EWCA Civ 879 , per Waller LJ, in which he said: "
“I do not accept that a litigant is able to distance himself from his expert in that way. The expert, whatever his duties, is still the witness of the party calling him. Serious failings by an expert may make it just to order indemnity costs, unless the expert and the party calling him can, for these purposes, be distinguished. In my view they cannot. As between the party calling the expert and the opposing party the risk should rest with the former.”
“(1) Where a claimant has delayed unreasonably in commencing or prosecuting proceedings, the court may exercise its discretion either to disallow interest for a period or to reduce the rate of interest. (2) In exercising that discretion the court must take a realistic view of delay. In the case of business disputes, litigation is for all parties an unwelcome distraction from their proper business. It is not reasonable to expect any party to take every litigious step at the first possible moment, or to concentrate on litigation to the exclusion of all else. Delay should only be characterised as unreasonable for present purposes when, after making due allowance for the circumstances, it can be seen that the claimant has neglected or declined to pursue his claim for a significant period. (3) When determining what disallowance or reduction of interest should be made to mark a period of unreasonable delay, the court should bear in mind that the defendant has had the use of the money during that period of delay.”