“… the expressions ‘constructive trust’ and ‘constructive trustee’ have been used by equity lawyers to describe two entirely different situations. The first covers those cases already mentioned, where the defendant, though not expressly appointed as trustee, has assumed the duties of a trustee by a lawful transaction which was independent of and preceded the breach of trust and is not impeached by the plaintiff. The second covers those cases where the trust obligation arises as a direct consequence of the unlawful transaction which is impeached by the plaintiff. A constructive trust arises by operation of law whenever the circumstances are such that it would be unconscionable for the owner of property (usually but not necessarily the legal estate) to assert his own beneficial interest in the property and deny the beneficial interest of another. In the first class of case, however, the constructive trustee really is a trustee. He does not receive the trust property in his own right but by a transaction by which both parties intend to create a trust from the outset and which is not impugned by the plaintiff. His possession of the property is coloured from the first by the trust and confidence by means of which he obtained it, and his subsequent appropriation of the property to his own use is a breach of that trust. Well-known examples of such a constructive trust are McCormick v. Grogan (1869) L.R. 4 H.L. 82 (a case of a secret trust) and Rochefoucald v. Boustead[1897] 1 Ch. 196 (where the defendant agreed to buy property for the plaintiff but the trust was imperfectly recorded). Pallant v. Morgan[1953] Ch. 43 (where the defendant sought to keep for himself property which the plaintiff trusted him to buy for both parties) is another. In these cases the plaintiff does not impugn the transaction by which the defendant obtained control of the property. He alleges that the circumstances in which the defendant obtained control make it unconscionable for him thereafter to assert a beneficial interest in the property.”
“30. It is impossible to prescribe exhaustively the circumstances sufficient to create a constructive trust but it is possible to recognise particular factual circumstances that will do so and also to recognise other factual circumstances that will not. A particular factual situation where a constructive trust has been held to have been created arises out of joint ventures relating to property, typically land. If two or more persons agree to embark on a joint venture which involves the acquisition of an identified piece of land and a subsequent exploitation of, or dealing with, the land for the purposes of the joint venture, and one of the joint venturers, with the agreement of the others who believe him to be acting for their joint purposes, makes the acquisition in his own name but subsequently seeks to retain the land for his own benefit, the court will regard him as holding the land on trust for the joint venturers. This would be either an implied trust or a constructive trust arising from the circumstances and if, as would be likely from the facts as described, the joint venturers have not agreed and cannot agree about what is to be done with the land, the land would have to be resold and, after discharging the expenses of its purchase and any other necessary expenses of the abortive joint venture, the net proceeds of sale divided equally between the joint venturers.”
“33. The constructive trust in these failed joint venture cases cannot, in my opinion, be recognised or imposed in the present case. The Yeoman's Row property was owned by the defendant company some years before Mrs Lisle-Mainwaring began her joint venture discussions (for such in effect they were) with Mr Cobbe. In the Banner Homes case[2000] Ch 372 , 397 Chadwick LJ commented on how the situation might appear in such a case: “Where the arrangement or understanding is reached in relation to property already owned by one of the parties, he may (if the arrangement is of sufficient certainty to be enforced specifically) thereby constitute himself trustee on the basis that ‘equity looks on that as done which ought to be done’; or an equity may arise under the principles developed in the proprietary estoppel cases.”
“The [Pallant v Morgan] equity is invoked where the defendant has acquired property in circumstances where it would be inequitable to allow him to treat it as his own.” “Where the arrangement or understanding is reached in relation to property already owned by one of the parties, he may (if the arrangement is of sufficient certainty to be enforced specifically) thereby constitute himself trustee on the basis that ‘equity looks on that as done which ought to be done’; or an equity may arise under the principles developed in the proprietary estoppel cases.”
“30. … Section 2 of the 1989 Act declares to be void any agreement for the acquisition of an interest in land that does not comply with the requisite formalities prescribed by the section. Subsection (5) expressly makes an exception for resulting, implied or constructive trusts. These may validly come into existence without compliance with the prescribed formalities. Proprietary estoppel does not have the benefit of this exception. The question arises, therefore, whether a complete agreement for the acquisition of an interest in land that does not comply with the section 2 prescribed formalities, but would be specifically enforceable if it did can become enforceable via the route of proprietary estoppel. It is not necessary in the present case to answer this question, for the second agreement was not a complete agreement and, for that reason, would not have been specifically enforceable so long as it remained incomplete. My present view, however, is that proprietary estoppel cannot be prayed in aid in order to render enforceable an agreement that statute has declared to be void. The proposition that an owner of land can be estopped from asserting that an agreement is void for want of compliance with the requirements of section 2 is, in my opinion, unacceptable. The assertion is no more than the statute provides. Equity can surely not contradict the statute. … ”
“[a] contract for the sale or other disposition of an interest in land can only be made in writing and only by incorporating all of the terms which the parties have expressly agreed in one document or, where contracts are exchanged, in each.”
“The promise must be unambiguous and must appear to have been taken seriously. Taken in context, it must have been a promise which one might reasonably expect to be relied upon by the person to whom it was made.”