解題
### Analysis of the Legal Position of Beatrice
To advise Beatrice, we must analyze her legal position under two distinct heads of contract law: first, the formation of a contract with Arthur (offer, acceptance, revocation, and the postal rule); second, the renegotiation of her contract with David (consideration, performance of an existing duty, and practical benefit).
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### 1. Beatrice v Arthur: Formation of a Contract
The central issue is whether a binding contract was formed between Arthur and Beatrice before Arthur revoked his offer.
* **The Offer:** Arthur's letter on Monday constitutes a firm offer to sell the printing press for £5,000. It contains clear terms and manifests an intention to be bound.
* **The Revocation:** An offer can be revoked at any time before it is accepted (*Payne v Cave*). However, revocation must be communicated to the offeree to be effective (*Byrne & Co v Leon Van Tienhoven & Co*). Arthur sends a revocation email at 4:00 PM on Wednesday. In business contexts, electronic communications are generally deemed communicated when they enter the recipient's system during normal business hours (*The Brimnes*; *Entores v Miles Far East Corp*), rather than when they are actually read. Thus, the revocation was likely communicated on Wednesday afternoon.
* **The Acceptance and the Postal Rule:**
* Beatrice posted her acceptance at 9:00 AM on Wednesday. Under the traditional postal rule (*Adams v Lindsell*), acceptance is complete the moment a letter is properly posted. If the postal rule applies here, Beatrice accepted the offer at 9:00 AM on Wednesday, several hours before Arthur sent his revocation at 4:00 PM. A binding contract would have been formed on Wednesday morning.
* However, the postal rule can be excluded by the offeror, either expressly or by implication. In *Holwell Securities Ltd v Hughes*, the phrase "notice in writing to" was held to require actual receipt, excluding the postal rule. Arthur’s letter states: "I must receive your acceptance by Friday at 5:00 PM." This clear insistence on actual receipt ("must receive") effectively excludes the operation of the postal rule.
* Consequently, Beatrice's acceptance was only effective upon actual receipt, which occurred on Friday at 10:00 AM.
* **Conclusion on Arthur:** Because the postal rule was excluded, no contract was formed when Beatrice posted the letter on Wednesday morning. Arthur's revocation of the offer was communicated and became effective when it arrived in Beatrice's inbox on Wednesday afternoon (within business hours). Therefore, Arthur’s revocation was effective, and no contract exists between Beatrice and Arthur.
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### 2. Beatrice v David: Consideration and Existing Duties
The issue here is whether Beatrice’s promise to pay David an extra £500 to complete work he was already contractually bound to do is supported by valid consideration.
* **Existing Contractual Duty:** The traditional rule established in *Stilk v Myrick* dictates that performing an existing contractual duty does not constitute fresh consideration to support a promise of extra payment.
* **The Exception (Practical Benefit):** The strict rule in *Stilk v Myrick* was modified by the Court of Appeal in *Williams v Roffey Bros & Nicholls (Contractors) Ltd*. Under this authority, a promise to pay extra for an existing duty can be enforceable if:
1. There is an existing contract for work or services.
2. The promisor (Beatrice) has reason to doubt that the promisee (David) will complete on time.
3. The promisor promises additional payment to ensure completion on time.
4. The promisor obtains a 'practical benefit' or obviates a 'disbenefit'.
5. The promise is not given under economic duress or fraud.
* **Application to the Facts:**
* David was already bound to finish by Thursday for £2,000. However, due to an external factor (materials shortage), he could not finish on time without extra funds.
* Beatrice secured a clear practical benefit: she ensured her workshop was renovated on time, preventing delays to her business expansion.
* There is no evidence of economic duress (e.g., David did not act in bad faith or threaten to walk off to extort money; he merely explained a genuine supply issue).
* **Conclusion on David:** Applying *Williams v Roffey*, Beatrice's promise to pay the additional £500 is supported by the practical benefit she received. She is legally bound to pay David the £500.
評分準則
### Mark Allocation (Total: 25 Marks)
Candidates are evaluated against the following criteria:
* **Knowledge and Understanding (8 marks):** Identification of key legal issues, relevant principles, and key case law (e.g., *Adams v Lindsell*, *Holwell Securities*, *Byrne v Van Tienhoven*, *Stilk v Myrick*, *Williams v Roffey*).
* **Application (10 marks):** Analytical application of rules of offer/acceptance (especially exclusion of postal rule and receipt of electronic revocation) and consideration (existing contractual duties vs practical benefits) to the facts of Beatrice's scenario.
* **Analysis and Conclusion (7 marks):** Coherent, logical structure leading to clear, legally sound conclusions on both issues.
#### Band Breakdown
* **Band 5 (21–25 marks):** Sophisticated analysis. Correctly identifies and fully evaluates the exclusion of the postal rule via "must receive" (*Holwell Securities*) and electronic revocation timing (*The Brimnes*). Clearly applies the *Williams v Roffey* criteria (including the absence of economic duress) to Beatrice and David's agreement.
* **Band 4 (16–20 marks):** Detailed analysis. Addresses both scenarios with appropriate case law. Explains the postal rule and its potential exclusion, and the difference between *Stilk v Myrick* and *Williams v Roffey*. May lack some depth on electronic revocation or duress, but reaches sensible conclusions.
* **Band 3 (11–15 marks):** Reasonable attempt. Focuses on the postal rule and basic consideration, but may fail to recognize the exclusion of the postal rule by Arthur's words, or treats the payment to David purely under *Stilk v Myrick* without considering *Williams v Roffey*.
* **Band 2 (6–10 marks):** Limited response. Identifies some general rules of contract formation or consideration but offers weak application or confuses the principles.
* **Band 1 (1–5 marks):** Basic assertion with minimal relevant legal framework.