‘ 10 Orders for costs (1) Subject to paragraph (2), the Tribunal may make an order in respect of costs only (a) under section 29(4) of the 2007 Act (wasted costs); or (b) if the Tribunal considers that a party or its representative has acted unreasonably in bringing, defending or conducting the proceedings.’
‘“Unreasonable" also means what it has been understood to mean in this context for at least half a century. The expression aptly describes conduct which is vexatious, designed to harass the other side rather than advance the resolution of the case, and it makes no difference that the conduct is the product of excessive zeal and not improper motive. But conduct cannot be described as unreasonable simply because it leads in the event to an unsuccessful result or because other more cautious legal representatives would have acted differently. The acid test is whether the conduct permits of a reasonable explanation. If so, the course adopted may be regarded as optimistic and as reflecting on a practitioner's judgment, but it is not unreasonable.’ ‘We were invited to give the three adjectives (improper, unreasonable and negligent) specific, self-contained meanings, so as to avoid overlap between the three. We do not read these very familiar expressions in that way. Conduct which is unreasonable may also be improper, and conduct which is negligent will very frequently be (if it is not by definition) unreasonable. We do not think any sharp differentiation between these expressions is useful or necessary or intended.’
‘A legal representative is not to be held to have acted improperly, unreasonably or negligently simply because he acts for a party who pursues a claim or a defence which is plainly doomed to fail. … As is well known, barristers in independent practice are not permitted to pick and choose their clients. … As is also well known, solicitors are not subject to an equivalent cab-rank rule, but many solicitors would and do respect the public policy underlying it by affording representation to the unpopular and the unmeritorious. Legal representatives will, of course, whether barristers or solicitors, advise clients of the perceived weakness of their case and of the risk of failure. But clients are free to reject advice and insist that cases be litigated. It is rarely if ever safe for a court to assume that a hopeless case is being litigated on the advice of the lawyers involved. They are there to present the case; it is (as Samuel Johnson unforgettably pointed out) for the judge and not the lawyers to judge it. It is, however, one thing for a legal representative to present, on instructions, a case which he regards as bound to fail; it is quite another to lend his assistance to proceedings which are an abuse of the process of the court. Whether instructed or not, a legal representative is not entitled to use litigious procedures for purposes for which they were not intended, as by issuing or pursuing proceedings for reasons unconnected with success in the litigation or pursuing a case known to be dishonest, nor is he entitled to evade rules intended to safeguard the interests of justice, as by knowingly failing to make full disclosure on ex parte application or knowingly conniving at incomplete disclosure of documents. It is not entirely easy to distinguish by definition between the hopeless case and the case which amounts to an abuse of the process, but in practice it is not hard to say which is which and if there is doubt the legal representative is entitled to the benefit of it.’
‘30. … The crucial question is whether, in all the circumstances of the case, the claimant withdrawing his claim has conducted the proceedings reasonably. It is not whether the withdrawal of the claim is in itself reasonable …’
‘40. … The principle of relevance means that the tribunal must have regard to the nature, gravity and effect of the unreasonable conduct as factors relevant to the exercise of the discretion [whether to order costs], but that is not the same as requiring BNP Paribas to prove that specific unreasonable conduct by the applicant caused particular costs to be incurred.’
‘41. … the indemnity principle must apply to the award of costs. It is not, however, punitive and impermissible for a tribunal to order costs without confining them to the costs attributable to the unreasonable conduct.’
‘41. … As I have explained, the unreasonable conduct is a precondition to order costs and it is also a relevant factor to be taken into account in deciding whether to make an order for costs and the form of the order.’