"There is no evidence...that the purchasers took any interest in an apportionment of the purchase price ... I agree ... that the view of the Vendors alone is unlikely to lead to a "proper attribution" ... I would not rule out an apportionment based upon proper valuations of the caravan and the removable contents ... I also consider that in view of the object of the valuation, the [reported valuation] should have covered the value of the caravan itself. Against this background I do not think that the tribunal is in a position to approve or make a valuation-based apportionment. "[22] I agree with Mr. Ewart that an apportionment based on that used by the appellant's own supplier may be less than perfect in terms of logic or even fairness. However this is a case where there has to be an apportionment and I have to determine the "proper attribution" of the parts of the consideration as directed by section 19 (4). Although the May 1996 leaflet is not binding on me ... I consider that any method of…apportionment used must give "a fair and reasonable result"