An 'entire agreement' clause that expressly extends to 'prior deeds in relation to the subject matter' is capable of superseding earlier deeds between the parties, even where the earlier deed is not mentioned in the recitals and the clause appears in the boilerplate provisions. Where two related documents are executed on the same day with different wording in otherwise identical boilerplate clauses, the additional words should be taken to have additional legal meaning. A clause in a deed restricting variation to a further deed executed by the parties does not prevent variation by a subsequent instrument that operates as a deed and is supported by consideration.
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