In Klifa v Slater & Anor  EWHC 427 (QB), concerning a ski accident in Courchevel, France, the Claim Form was issued on 14 January 2021, just within the three year limitation period of England and Wales but just after the Brexit “Exit Day” also know as IP day (Brexit implementation day) (of 31 December 2020). Defendants take advantage of that to argue a forum non conveniens defence (which readers will know would have been impossible under Brussels Ia). France is suggested to be the ‘most appropriate forum’.
The skiing accident took place on 27 January 2018 and when (and as still is the case) the Claimant was domiciled and resident and habitually resident in France, the First Defendant was domiciled and resident (they being on holiday) in England & Wales, and the Second Defendant (the insurance company) was domiciled in England & Wales. Under Rome II, French law is the applicable law, other than for procedural law, including as to recovery of legal and other costs of the litigation, which is subject to English law, lex fori.
That latter element returns (with reference to ia Wall v Mutuelle de Poitiers)  as part of the forum non conveniens assessment, seeing as (Dagnall M) ‘in consequence of the difference in their methods of adducing expert evidence, the English & Welsh jurisdiction procedural approach is likely to be considerably more expensive than that in France, and which is reflected in the costs rules and approach of each country.’
At  Master Dagnall sums up the many issues leading to the case being very ‘French’ in nature, deciding on balance however  that the defendants have not met the (high hurdle) of proving that France is “distinctly” or “clearly” the more appropriate forum.
At  ff he holds obiter that even if they had met that test, a stay in favour of proceedings in France would not assist with “achieving the ends of justice”L the second part of the forum non test. At  two factors are singled out: enforcement will have to take place in England; and a lot of work prior to the claim form being issued was carried out prior to IP day, when forum non was not an issue. Recovering those costs would be impossible in France.
The point has been made ad nauseam by many and this case is a good illustration: post Brexit, forum non is back with a vengeance and it is a time-consuming and costly business.