LATIFA KOSTA v 1) FRANCIS ANTHONY ARMSTRONG CARNWATH CBE (2) MICHAEL TREFUSIS CHAMBERLAYNE LVO (3) THE HON. JOHN HUGO TRENCHARD RUSSELL (AS TRUSTEES OF THE PHILLIMORE ESTATE)
Decision date: 2 July 2014
Neutral citation: [2014] UKUT 319 (LC)
Overall AI summary confidence: high
Short overview
This short overview is intended to summarise the case, issues and outcome so far as they are supported by the judgment.
AI confidence in this short overview: high
This appeal concerned the correct relativity to apply to a 52.45-year lease for valuation under the Leasehold Reform provisions, with the LVT having applied 76% and the appellant urging about 87% based on hedonic regression evidence. The Upper Tribunal found that, although Dr Bracke’s hedonic models were technically competent and replicable, substantial macro concerns (implausible point estimates, curve shape and temporal/market-change issues) meant his results could not reliably assist for the 2011 valuation date. The Tribunal therefore upheld the LVT’s 76% relativity and dismissed the appeal.
Ratio decidendi
This summary is intended to identify the ratio decidendi, meaning the legal reasons for deciding and the binding part of the decision.
AI confidence in this ratio decidendi summary: high
A technically sound hedonic regression will only be persuasive in enfranchisement valuation if it also satisfies economic and valuation plausibility and is demonstrably suitable to the relevant valuation date and statutory assumptions; where alternative published relativity graphs reflect established market practice and the regression evidence is insufficiently reliable, the graphs can properly be relied on to determine relativity.
Obiter dicta
This summary is intended to identify obiter dicta, meaning observations made by the way that were not necessary to deciding the case and are not binding.
AI confidence in this obiter dicta summary: medium
The Tribunal indicated that experts with commercial interests in their methodology are not automatically disqualified; issues of impartiality go to weight and cross‑examination. It also noted that the mere presence of multiple RICS graphs published without single endorsement limits the authoritative value of any individual published graph and that courts should examine how such graphs were produced.