“It seems that the percentage of 10 [as sought by the valuer for the commissioners] is derived from the decision in Cust [Cust v Commissioners of Inland Revenue [1917] EGD 307] and that this percentage has become customary. The finding in Cust related to an estate (which fell to be valued in 1913) comprising licenced premises, houses, shops, cottages, smallholdings, farms, gardens, stables and woodland. The position in the case of such a half share as has to be valued here is unusual in the sense that the purchaser would have the right to occupy the property jointly with the other owner and that is a factor which, in my judgment, on the evidence, is one which also points to a larger percentage than 10.”