“the court must, unless it considers it unjust to do so, order that the claimant is entitled to –(a) interest on the whole or part of any sum of money (excluding interest) awarded, at a rate not exceeding 10% above base rate for some or all of the period starting with the date on which the relevant period expired; (b) costs … on the indemnity basis from the date on which the relevant period expired; (c) interest on those costs at a rate not exceeding 10% above base rate; and (d) … an additional amount, which shall not exceed £75,000 ...”