“29. The LVT is perfectly entitled, as an expert tribunal, to raise matters of its own volition. Indeed it is an honourable part of its function, given that part of the purpose of the legislation is to protect tenants from unreasonable charges and the tenants, who may not be experts, may have no more than a vague and unfocussed feeling that they have been charged too much. But it must do so fairly, so that if it is a new point which the tribunal raise, which the respondent has not mentioned, the applicant must have a fair opportunity to deal with it.”