"Where an innocent volunteer (as distinct from a purchaser for value without notice) mixes 'money' of his own with 'money' which in equity belongs to another person, or is found in possession of such a mixture, although that other person cannot claim a charge on the mass superior to the claim of the volunteer he is entitled, nevertheless, to a charge ranking pari passu with the claim of the volunteer. ................... But this burden on the conscience of the volunteer is not such as to compel him to treat the claim of the equitable owner as paramount. That would be to treat the volunteer as strictly as if he himself stood in a fiduciary relationship to the equitable owner which ex hypothesi he does not. The volunteer is under no greater duty of conscience to recognize the interest of the equitable owner than that which lies upon a person having an equitable interest in one of two trust funds of 'money' which have become mixed towards the equitable owner of the other. Such a person is not in conscience bound to give precedence to the equitable owner of the other of the two funds."
"The mere fact that money lent has been expended upon discharging a secured liability of the borrower does not give rise to any implication of subrogation unless the contract under which the money was borrowed provides that the money is to be applied for this purpose: Wylie v Carlyon[1922] 1 Ch. 51 ."
"It is always dangerous to try to lay down general principles unnecessarily, but it does seem to me to be safe to say this: that where on all the facts the court is satisfied that the true nature of the transaction between the payer of the money and the person at whose instigation it is paid is simply the creation of an unsecured loan, this in itself will be sufficient to dispose of any question of subrogation. That really, as it seems to me, is to say no more than that the question of subrogation or no subrogation cannot be divorced from a review of the rights proved or presumed to be intended to be created between the payer of the money and the person requiring its payment."
"Here, too, we think that the effect of the payment to the bank was to extinguish the debt and the charge held by the bank ceased to exist. The case cannot, we think, be regarded as one of subrogation, and if the appellants were entitled to a charge it would have to be a new charge created by the court. The position in this respect does not appear to us to be affected by the fact that the payment off of this debt was one of the objects for which the grant was made. The effect of the payment off was that the charity, which had previously held only an equity of redemption, became the owners of unincumbered property. That unincumbered property derived from a combination of two things, the equity of redemption contributed by the charity and the effect of the Diplock money in getting rid of the incumbrance. If equity is now to create a charge (and we say 'create' because there is no survival of the original charge) in favour of the judicial trustee, it will be placing him in a position to insist upon a sale of what was contributed by the charity. The case, as it appears to us, is in effect analogous to the cases where Diplock money is expended on improvements on charity land. The money was in this case used to remove a blot on the title; to give the judicial trustee a charge in respect of the money so used would, we think, be equally unjust to the charity who, as the result of such a charge, would have to submit to a sale of the interest in the property which it brought in. We may point out that if the relief claimed were to be accepted as a correct application of the equitable principle, insoluble problems might arise in a case where in the meanwhile fresh charge on the property had been created or money had been expended upon it."
"Where an innocent volunteer (as distinct from a purchaser for value without notice) mixes 'money' of his own with 'money' which in equity belongs to another person, or is found in possession of such a mixture, although that other person cannot claim a charge on the mass superior to the claim of the volunteer he is entitled, nevertheless, to a charge ranking pari passu with the claim of the volunteer. ................... But this burden on the conscience of the volunteer is not such as to compel him to treat the claim of the equitable owner as paramount. That would be to treat the volunteer as strictly as if he himself stood in a fiduciary relationship to the equitable owner which ex hypothesi he does not. The volunteer is under no greater duty of conscience to recognize the interest of the equitable owner than that which lies upon a person having an equitable interest in one of two trust funds of 'money' which have become mixed towards the equitable owner of the other. Such a person is not in conscience bound to give precedence to the equitable owner of the other of the two funds."
"The mere fact that money lent has been expended upon discharging a secured liability of the borrower does not give rise to any implication of subrogation unless the contract under which the money was borrowed provides that the money is to be applied for this purpose: Wylie v Carlyon[1922] 1 Ch. 51 ."
"It is always dangerous to try to lay down general principles unnecessarily, but it does seem to me to be safe to say this: that where on all the facts the court is satisfied that the true nature of the transaction between the payer of the money and the person at whose instigation it is paid is simply the creation of an unsecured loan, this in itself will be sufficient to dispose of any question of subrogation. That really, as it seems to me, is to say no more than that the question of subrogation or no subrogation cannot be divorced from a review of the rights proved or presumed to be intended to be created between the payer of the money and the person requiring its payment."
"Here, too, we think that the effect of the payment to the bank was to extinguish the debt and the charge held by the bank ceased to exist. The case cannot, we think, be regarded as one of subrogation, and if the appellants were entitled to a charge it would have to be a new charge created by the court. The position in this respect does not appear to us to be affected by the fact that the payment off of this debt was one of the objects for which the grant was made. The effect of the payment off was that the charity, which had previously held only an equity of redemption, became the owners of unincumbered property. That unincumbered property derived from a combination of two things, the equity of redemption contributed by the charity and the effect of the Diplock money in getting rid of the incumbrance. If equity is now to create a charge (and we say 'create' because there is no survival of the original charge) in favour of the judicial trustee, it will be placing him in a position to insist upon a sale of what was contributed by the charity. The case, as it appears to us, is in effect analogous to the cases where Diplock money is expended on improvements on charity land. The money was in this case used to remove a blot on the title; to give the judicial trustee a charge in respect of the money so used would, we think, be equally unjust to the charity who, as the result of such a charge, would have to submit to a sale of the interest in the property which it brought in. We may point out that if the relief claimed were to be accepted as a correct application of the equitable principle, insoluble problems might arise in a case where in the meanwhile fresh charge on the property had been created or money had been expended upon it."