“This expression is defined to mean ‘… the23rd March 1965 or such later day as by virtue ofs.25(3) of the Rent Act 1977 would be the appropriate day for the purposes of that Act in relation to a dwelling-house consisting of the house in question if the reference in para (a) of that provision to a rateable value were to a rateable value other than nil’. The appropriate day is March 23 1965 unless the house in question fails to fulfil one of the following three conditions: (1) it is a hereditament for which a rateable value other than nil was shown in the rating valuation list in force on that date; or (2) it forms part of such a hereditament; or (3) it consists of or forms part of two or more such hereditaments. Thus, in relation to most houses built before March 23 1965, that date will be the appropriate date. In other cases, the appropriate date is the first day thereafter on which the house does fulfil one of the above three conditions. Problems can arise in ascertaining ‘the appropriate day’ where a property is altered and/or its use changed, and a consequential alteration is made in the valuation list. An example is where a property used as flats, with separate 5 entries in the valuation list on March 23 1965 for each flat, is converted into a house in single occupation and the valuation list is subsequently altered to include only a single entry for the house. There is remarkably little authority dealing directly with the question whether on March 23 1965 the house consisted of two or more hereditaments (making that date ‘the appropriate day’) or whether the house only appears in the valuation list at the later date (which is thus ‘the appropriate day’). It has however been held [in Griffiths v Birmingham City District Council [1987] CLYB 2172, Judge Clive Taylor QC, Stafford County Court] that the principle to be applied is whether there has been a change in identity in the rateable hereditament. It is considered that there must be a substantial change between the premises in their former state and their subsequent state. Mere improvement is not sufficient. The question is one of fact and degree for the judge. In this case two derelict cottages had been converted to provide a single house of character with modern amenities—there had been a substantive change of identity and ‘the appropriate day’ was thus the first day on which the modified house first appeared in the valuation list. It can be necessary to ascertain the rateable value of the house and premises on April 1 1973 or on March 31 1990. However, such a date is not ‘the appropriate day’ (unless it happens to be the date on which the house first appears in the valuation list) as is sometimes erroneously thought.”
“This case is no more than illustration of the point that issues of ‘law’ in this context are not narrowly understood. The Court can correct ‘all kinds of error of law, including errors which might otherwise be the subject of judicial review proceedings’ (R v IRC ex p Preston[1985] 1 AC 835 at 862 per Lord Templeman; see also De Smith, Woolf and Jowell, Judicial Review, 5th edn, para 15-076). Thus, for example, a material breach of the rules of natural justice will be treated as an error of law. Furthermore, judicial review (and therefore an appeal on law) may in appropriate cases be available where the decision is reached ‘upon an incorrect basis of fact’, due to misunderstanding or ignorance (see R (Alconbury Ltd) v Secretary of State[2001] UKHL 23 ,[2003] 2 AC 295 at para 53, per Lord Slynn). A failure of reasoning may not in itself establish an error of law, but it may ‘indicate that the tribunal had never properly considered the matter…and that the proper thought processes have not been gone through’ (Crake v Supplementary Benefits Commission[1982] 1 All ER 498 at 508).”
“Whether the new letting is to be regarded as the same entity as the old is a question for the county court judge. I would only add that there must be a substantial change between the premises formerly let and those subsequently the subject of a letting. A mere small or incidental change is not enough.”
“By fixing25 March 1965 as the appropriate day for houses rated before that day, the Act of 1967 indicated clearly that events taking place after25 March 1965 resulting in an increase or decrease of rateable value were to be ignored. Changes in rateable value could take place as a result of a quinquennial or other general revaluation or as a consequence of changes taking place to a particular hereditament which included a house. The rateable value of such a hereditament might be reduced as a result of deterioration of the house or the neighbourhood. The rateable value of the hereditament could be increased by an extension or improvement to the house itself or by the erection of a building in the curtilage of the house. All these changes must be ignored. For example, if in the present case Riverside Cottages had been rated before25 March 1965 , the hereditament comprising Riverside Cottages would have included the courtyard. If after25 March 1965 the tenant had erected five garages in the curtilage of Riverside Cottages, the rating authority might have increased the rateable value of Riverside Cottages or might have rated the five garages as a separate hereditament. Whether the garages were rated with the cottages or as a separate hereditament, the rateable value attributable to Riverside Cottages and the premises including the five garages for the purposes of the Act of 1967 would remain the rateable value as fixed on25 March 1965 . A tenant of a house rated on25 March 1965 cannot improve his position under the Act of 1967 by building in the curtilage of the house garages or other buildings which become rated as a separate hereditament or lead to an increase in the rateable value of the house. Under the Act of 1967 the tenant is entitled to purchase both the house and the garages which are included in the curtilage as premises, provided that the rent payable for the house and premises is less than two-thirds of the rateable value of the house on25 March 1965 . Similarly in the present case the tenant could not improve his position under the Act of 1967 by building five garages in the curtilage of the cottages after the appropriate day. It is significant that section 25(4) of the Act of 1977 does permit an increase in rateable value after the appropriate day in limited circumstances. By section 25(4) such a variation is taken into account but only where the variation ‘has effect from a date not later than the appropriate day’. In other words if a garage is built in the courtyard of a house before the appropriate day but is not rated until after the appropriate day or is not taken into account in the rateable value of the house until after the appropriate day, nevertheless effect can be given to the variation for the purposes of the Act of 1967 if the variation when it takes place ‘has 13 effect from a date not later than the appropriate day’. But unless the conditions specified in section 25(4) are satisfied, events which take place after the appropriate day must be disregarded, and the appropriate day itself is by section 4(1) of the Act of 1967 judged by reference to the first day upon which the house as a single hereditament or as two or more hereditaments first appears in the valuation list.”