A short note on the quantification of enrichment in HKR Middle East Architects Engineering LC v English
In two previous posts (here and here), I have looked at issues arising out of McDonald J’s judgments in HKR Middle East Architects Engineering LC v English (No 1) [2019] IEHC 306 (10 May 2019); (No 2) [2021] IEHC 142 (3 March 2021); (No 3) [2021] IEHC 376 (31 May 2021). In HKR v English (No 1) McDonald J held that English had been unjustly enriched at the expense of HKRME. However, he valued that enrichment, not as the full US$8,094,873 ultimately paid to English, but as limited to the (probably substantially smaller) amount of HKRME’s unpaid and lawful liabilities. And he directed that an account should be taken of those liabilities. In both HKR v English (No 2) and HKR v English (No 2), McDonald J affirmed this conclusion.
In my first post, I pointed out that a cause of action for restitution of unjust enrichment is complete when the payment is made by the plaintiff and received by the defendant, so that the defendant’s enrichment is the amount paid by the plaintiff. This is because, where the enrichment is the payment of money, complex questions seldom arise (Dublin Corporation v Building and Allied Trade Union (the Bricklayers’ Hall case) [1996] 2 IR 468, 483; [1996] 2 ILRM 547, 558, (24 July 1996) [37]-[40] (doc | pdf | html) (Keane J; Hamilton CJ, O’Flaherty, Blayney and Barrington JJ concurring); Test Claimants in the Franked Investment Income Group Litigation v Revenue and Customs (No 3) [2021] UKSC 31 (23 July 2021) [FII (No 3)] [170] (Lords Reed and Hodge (in a joint judgment; Lords Briggs, Sales and Hamblen concurring)).…