“I can see no reason why, if an account is taken, the party paying the instalments should not be entitled to set a due proportion of the whole of the instalments paid against the share of the other party. The mortgagee will normally have a charge on the property for principal and interest and a right to possession and sale to enforce his charge. The payment of instalments due under the mortgage operates to relieve the property from the charge and gives rise to an equitable right of contribution by the co-owner who has not paid his due proportion of the instalments.”” “I can see no reason why, if an account is taken, the party paying the instalments should not be entitled to set a due proportion of the whole of the instalments paid against the share of the other party. The mortgagee will normally have a charge on the property for principal and interest and a right to possession and sale to enforce his charge. The payment of instalments due under the mortgage operates to relieve the property from the charge and gives rise to an equitable right of contribution by the co-owner who has not paid his due proportion of the instalments.””