“It is entirely appropriate that, as an expert tribunal, an LVT should use its knowledge and experience to test, and if necessary to reject, evidence that is before it. But there are three inescapable requirements. Firstly, as a tribunal deciding issues between the parties, it must reach its decision on the basis of evidence that is before it. Secondly, it must not reach a conclusion on the basis of evidenced that has not been exposed to the parties for comment. Thirdly, it must give reasons for its decision. In the present case the tribunal rejected that evidence of both the experts on relativity, and it was entitled to do this provided its reasons for doing so were explained. But in basing its decision on “its own knowledge and experience, particularly in relation to relativities which have been agreed between parties or their valuers in other similar cases” it was in error because those agreements on relativity had not been identified nor had the parties had the opportunity to comment on them. As expressed, the decision contravened the second requirement. In said that it did not rely on any specific case or cases, but on this basis the first requirement was contravened. As for the third requirements, reasons that state that the decision was based on no evidence or on evidence that was not disclosed to the parties are adequate in one sense: they enabled the invalidity of the decision to be established. But it support a valid decision the reasons must enable the parties to understand why it was that the tribunal reached the conclusion that it did rather than some other conclusion, so as to show that the conclusion was one to which the tribunal was entitled to come on the basis of the evidence before it.” 9. That case of course concerned the question of expert evidence and the basis of that evidence, which is somewhat different to the usual issues raised in service charge disputes which frequently concern straightforward (but detailed) issues of fact about the appropriate level of the costs of goods or services provides. In Schilling v Canary Riverside Development PTE Limited LRX/26/2005 it was said at paragraph 15: “If the landlord is seeking a declaration that a service charge is payable he must show not only that the cost was incurred but also that it was reasonably incurred to provide services or works of a reasonable standard, and if the tenant seeks a declaration to the opposite effect, he must show that either the cost or the standard was unreasonable. In discharging that burden the observations of Wood J in the Yorkbrook case make clear the necessity for the LVT to ensure that the parties know the case which each has to meet and for the evidential burden to require the tenant to provide a prima facie case of unreasonable cost or standard.” 10. The relevant citation from Yorkbrook Investments Limited v Batten[1985] 2 EGLR 100 at 102K (CA) is: “During argument on the issue of garden maintenance, it was indicated that registrars of county courts and those practising in this field were finding difficulty in dealing with the burden of proof when considering applications for declarations under the Housing Acts [that is the predecessor provisions to s19 of the landlord andTenant Act 1985 ]. Having examined those statutory provisions, we can find no reason for suggesting that there is any presumption for or against a finding of reasonableness of standard or of costs. The court will reach its conclusion on the whole of the evidence. If the normal rules of pleadings are met, there should be no difficulty. The landlord making his claim for maintenance contributions will no doubt succeed, unless a defence is served saying that the standard of the costs are unreasonable. The tenant in such a pleading will need to specify the item complained of and the general nature – but not the evidence – of his case. No doubt discovery will need to be ordered at an early stage, but there should be no problem in each side knowing the case that it has to meet, provided that the court maintains a firm hold over its procedures. If the tenant gives evidence establishing a prima facie case, then it will be for the landlord to meet those allegations and ultimately the court will reach its decisions. The question of a reasonable charge arises in claims for a quantum meruit, and the courts over the years have not been hampered by problems about the burden of proof.”