Kumlin & Anor v Jonsson & Ors  EWHC 1095 (QB) disciplines forum shopping, in this case libel tourism, in a claim that is considered a SLAPP: a Strategic Lawsuit against public participation.
First Claimant is an entrepreneur, businessman and investor in sustainable and ethical business ventures, resident in Monaco, with business interests in the UK including in the Second Claimant, of which he is the founder, Chairman and Chief Executive Officer. He is a Swedish citizen. Second Claimant is a public limited company registered in England and Wales. Claimants’ case is that between 29 September 2020 and 2 November 2020 the Defendants, or some of them, all of whom are Swedish, published or caused to be published on the Website eight articles concerning the Claimants. There was further publication via Facebook, Twitter, etc, where links to the Articles were posted.
The Articles are in Swedish. Knowles J  advances the reasoning, proposed by defendants, that jurisdiction under any of the gateways as a result of A4 BIa, locus damni or locus delicti commissi (A7(2) BIa per CJEU Bier and Shevill), or centre of interests (A7(2) BIa, per CJEU eDate and Bolagsupplysningen) only exist to the degree the case is actually actionable in those cases which, he submits, requires reference to the domestic laws of those Member States (e.g. a minimum ‘publication’ threshold). I believe this is incorrect: jurisdiction and actionability are not the same. While lex fori on threshold issues will have an immediate impact on the practical reality of a claim, it does not stand in the way of principled jurisdiction under BIa, which exists without reference to national laws.
The judge refers to much CJEU and E&W authority, all of it discussed on this blog, most recently the Court of Appeal in Mincione.
Knowles J’s discussion eg  ff of the intensity of publication etc required, under residual double actionability rules, in my view is a threshold question and not, as it is presented, a jurisdictional, gateway question, albeit the analysis in this section is mixed with justifiable discussion of direct v indirect damage under the CJEU Marinari rule. The judgment is much more extensive on this point than it could have been in my opinion.
 it is concluded that on the centre of interest issue, which is relevant for the natural person claimant only, his centre of interests is Monaco, where he is habitually resident. That is a factual assessment which is unlikely to be material for an appeal.
EU private international law, 3rd ed. 2021, 2.439 ff.