Where a claimant has picked up one or more costs orders in its favour on the way to a trial, but fails very badly at the trial (for example due to exaggeration), can the costs judge assess those costs at nil on the footing that they were not, as it turned out, reasonably incurred because they had been incurred in an action that sought an exaggerated sum which should never have been claimed?  No, according to Business Environment Bow Lane Ltd v Deanwater Estates Ltd [2009] EWHC 2014 (Ch).