“(1) The court has discretion as to – (a) whether costs are payable by one party to another; (b) the amount of those costs; and (c) when they are to be paid. (2) If the court decides to make an order about costs – (a) the general rule is that the unsuccessful party will be ordered to pay the costs of the successful party; but (b) the court may make a different order… (4) In deciding what order (if any) to make about costs, the court will have regard to all the circumstances, including – (a) the conduct of all the parties; (b) whether a party has succeeded on part of its case, even if that party has not been wholly successful; and (c) any admissible offer to settle made by a party which is drawn to the court’s attention, and which is not an offer to which costs consequences under Part 36 apply. (5) The conduct of the parties includes – (a) conduct before, as well as during, the proceedings …; (b) whether it was reasonable for a party to raise, pursue or contest a particular allegation or issue; (c) the manner in which a party has pursued or defended its case or a particular allegation or issue; and (d) whether a claimant who has succeeded in the claim, in whole or in part, exaggerated its claim…”