Megarry VC stated that "A resulting trust is essentially a property concept; any property that a man does not effectually dispose of remains his own". A resulting trust could also be defined as an equitable reversion implied by the courts that may assist in the returning of trust property back to the settlor where there is doubt concerning his intention. In Re Vandervell's Trusts (No 2), he divided them into two categories; presumed resulting trusts, which are created by the presumed intention of the transferor of property, and automatic resulting trusts, which arise regardless of the transferor's intention whenever he has failed to dispose of the beneficial interest. Lord Browne-Wilkinson, in Westdeutsche Landesbank v Islington London Borough Council, disagreed with Megarry's classification. While he agreed there were two categories, he felt the dividing line was not based on intention, and the classes were "where A makes a voluntary payment to B or pays (wholly or in part) for the purchase of property which is vested either in B alone or in the joint names of A and B" and "Where A transfers property to B on express trusts, but the trusts declared do not exhaust the whole beneficial interest", with both involving a presumption of intention. It is possible to argue that Quistclose trusts are also a category of resulting trusts, but their classification is the subject of much debate and remains ambiguous. The theoretical justification for resulting trusts was discussed by the Privy Council, in Air Jamaica v Charlton, where Lord Millet said that "Like a constructive trust, a resulting trust arises by operation of law, though unlike a constructive trust it gives effect to intention. But it arises whether or not the transferor intended to retain a beneficial interest - he almost always does not - since it responds to the absence of any intention on his part to pass a beneficial interest to the recipient". Resulting trusts were intended to fill in the gap left by a veiled transfer, obeying the equitable maxim that "equity will not suffer a wrong to be without a remedy". In Westdeutsche Landesbank, Browne-Wilkinson stated that resulting trusts "are traditionally regarded as examples of trusts giving effect to the common intention of the parties. A resulting trust is not imposed by law against the intentions of the trustee (as in a constructive trust) but gives effect to his presumed intention". Alastair Hudson,