Deeds

- Promise/obligation contained in validly executed deed is binding

"'[In] my opinion, no particular technical form of words or acts is necessary to render an instrument the deed of the party sealing it. The mere affixing of the seal does not render it a deed; but as soon as there are acts or words sufficient to shew that it is intended by the party to be executed as his deed presently binding on him, it is sufficient." (Xenos v. Wickham (1867) LR 2 HL 296 at 312, Blackburn J)

- Deed can operate unilaterally, without consideration

"Mr Black submitted that there was a distinction between a simple contract and a covenant in that consideration and consensus was required for a simple contract whereas a deed operated unilaterally and was not dependent on the existence of consideration or mutual obligations. While that is of course correct as a matter of strict law, nevertheless it seems to me that where parties have in fact entered into obligations in the form of mutual covenants in a deed, there can from a contractual viewpoint be no sensible reason for not treating the obligations as being capable of having the same legal effect if that is what the parties intended." (Tameside Metropolitan BC v. Barlow Securities Group Services Ltd (2000) 75 ConLR 112 at 130)

Retrospective effect

- Deed can have retrospective effect between the parties

"[58] I conclude that clause 5 was clear and unambiguous. It was the express intention of the parties to make the deed come into effect on an ascertainable and certain day, namely the day following the date of the issue of the Certificate of Practical Completion. Even if the words of clause 5 did not express an intention that it should have retrospective effect, the factual matrix of the deed, and in particular clause 45.1.3 of the building contract make it clear that it was the parties common intention that clause 5 should operate retrospectively. As Sir John Megaw said in City of Westminster v Clifford Culpin, the parties plainly so intended." (Northern & Shell Plc v. John Laing Construction Ltd [2003] EWCA Civ 1035)

"[42] The contractual obligation in this contract for the building of 106 houses with the appropriate services was to "... carry out and complete ..." the works. The writ was issued on 8th February 1996. The work was done in pursuance of an agreement under seal, which was intended to and did operate retrospectively; therefore any breaches of contract should be regarded as occurring at the date of breach, rather than time starting to run only on execution of the deed (see Megaw LJ in City of Westminster -v- Clifford Culpin & Partners [1986] 12 Con LR 116 at 138-139)." (Tameside Metropolitan BC v. Barlow Securities Group Services Ltd [2001] EWCA Civ 1)

"The true position in my judgment is that it is a matter of the construction of the relevant document whether the parties have agreed that the covenant should have full retrospective effect or whether their intention was only to create an immediate or a prospective liability on the execution of the deed and that there is no rule of law which prevents effect from being given to what the parties have actually agreed." (Tameside Metropolitan BC v. Barlow Securities Group Services Ltd (2000) 75 ConLR 112 at 131)

Estoppel re requirements for valid deed

- Depends upon intention of parties

"[51] Whether or not a clause in a contract is capable of having a retrospective effect, depends upon the express or implied intention of the parties. Trolloppe & Colls Limited, The Atomic Power Constructions Limited [1963] 1 WLR at 340, 341. In relation to the implication of such a term Mr Justice Megaw, as he then was, said:-

"Terms can only be implied where, to use the common phrase, they are necessary in order to give 'business efficacy' to the contract…… On the other hand I do not think that a term such as this can be implied for the purpose of upholding the existence of a contract, unless it can clearly be seen that it conforms with what the parties truly intended and with what they both would have accepted as a matter of course had the question been raised in the course of negotiations or at the making of the supposed contract."
In City of Westminster v Clifford Culpin & Partners 12 Con LR 117, 139 Sir John Megaw again made it clear that where parties plainly intended a deed to have retrospective effect full effect should be given to that common intention even though it was not expressed in words." (Northern & Shell Plc v. John Laing Construction Ltd [2003] EWCA Civ 1035)

"[41] A contract or a deed can take effect retrospectively: Trollope & Colls Ltd and Holland & Hannen and Cubitts Ltd (t/a Nuclear Civil Constructors (a firm)) v Atomic Power Constructions Ltd [1963] 1 WLR 333 per Megaw J pp.339; Tameside Metropolitan Borough Council v Barlow Securities Group Services Ltd [2001] EWCA Civ 1 per Henry LJ at paragraph [42].

[42] Whether or not a clause in a contract is capable of having a retrospective effect depends on the express or implied intention of the parties: Trollope & Colls (above) per Megaw J pp.340-341; Northern & Shell plc v John Laing Construction Ltd [2003] EWCA Civ 1035 per Nelson J at paragraph [51].

[43] Where it is clear that the parties intended a deed to have retrospective effect, full effect should be given to that common intention even if it has not been expressed in words: Westminster City Council v Clifford Culpin & Partners (1987) Con LR 117 per Sir John Megaw at p.139; Northern & Shell (above) per Nelson J at paragraph [52]." (Swansea Stadium Management Company Ltd v. City & County of Swansea [2018] EWHC 2192 (TCC), O'Farrell J)

- No estoppel to defeat absence of signature

"[28] For the claimant, Mr Rayner James accepts that an estoppel could not defeat the absence of a signature, as distinct from a defect in or the absence of its attestation. The signature is fundamental to the validity of the deed. The absence of attestation in the manner required by section 1 does not, he submits, subvert the policy of the Act. That policy seeks to ensure that signatures on deeds are authentic and to limit the possibility of disputes as to authenticity. There may however be cases, such as the present case, where the authenticity of the signatures is not in question and public policy need not and does not go so far as to prevent the raising of an estoppel where there is a defect in the manner of attestation." (Shah v. Shah [2001] EWCA Civ 527)

- Estoppel can defeat absence of proper attestation

"[30] I have however come to the conclusion that there was no statutory intention to exclude the operation of an estoppel in all circumstances or in circumstances such as the present. The perceived need for formality in the case of a deed requires a signature and a document cannot be a deed in the absence of a signature. I can detect no social policy which requires the person attesting the signature to be present when the document is signed. The attestation is at one stage removed from the imperative out of which the need for formality arises. It is not fundamental to the public interest, which is in the requirement for a signature. Failure to comply with the additional formality of attestation should not in itself prevent a party into whose possession an apparently valid deed has come from alleging that the signatory should not be permitted to rely on the absence of attestation in his presence. It should not permit a person to escape the consequences of an apparently valid deed he has signed, representing that he has done so in the presence of an attesting witness, merely by claiming that in fact the attesting witness was not present at the time of signature. The fact that the requirements are partly for the protection of the signatory makes it less likely that Parliament intended that the need for them could in all circumstances be used to defeat the claim of another party.

...

[33] Having considered the wording of section 1 in the context of its purpose and the policy consideration which apply to deeds, I am unable to detect a statutory intention totally to exclude the operation of an estoppel in relation to the application of the section or to exclude it in present circumstances. The section does not exclude an approach such as that followed by Sir Nicholas Browne-Wilkinson in TSB. For the reasons I have given, the delivery of the document in my judgment involved a clear representation that it had been signed by the third and fourth defendants in the presence of the witness and had accordingly been validly executed by them as a deed. The defendant signatories well knew that it had not been signed by them in the presence of the witness, but they must be taken also to have known that the claimant would assume that it had been so signed and that the statutory requirements had accordingly been complied with so as to render it a valid deed. They intended it to be relied on as such and it was relied on. In laying down a requirement by way of attestation in section 1 of the 1989 Act, Parliament was not in my judgment excluding the possibility that an estoppel could be raised to prevent the signatory relying upon the need for the formalities required by the section. In my judgment, the judge was correct in permitting the estoppel to be raised in this case and in his conclusion that the claimant could bring an action upon the document as a deed." (Shah v. Shah [2001] EWCA Civ 527)

- Material alteration after execution without consent rendering deed void

"[45] In the light of my conclusions set out above, it follows that I consider that the Judge erred in finding that the rule in Pigot's Case did not apply to the Legal Charge. He should have found that the Respondent had not proved either that the alteration was a mistake or that it was not material. The alteration was both deliberate and material and the application of the rule means that the Legal Charge was rendered void, and the Respondent was not able to enforce it by a possession order against the House." (Boult v. Together Personal Finance Limited [2026] EWHC 809 (Ch), Green J)