CA Indosuez (Switzerland) SA & Anor v Afriquia Gaz SA & Anor  EWHC 2871 (Comm) is largely a case of statutory construction (here: of the amended Civil Procedure Rules – CPR).
It transpires from current judgment that similar issues were discussed (yet eventually did not need determination) in Naftiran Intertrade Company (Nico) Limited and Anor v G.L. Greenland Limited and Anor  EWHC 896 (Comm) (unpublished).
I do not often copy /paste big chunks of judgment let alone the facts parts of them, however here I feel it is quite necessary:  ff, in summary:
Gulf Petroleum FZC, the First Part 20 Defendant (“GP”) had trade finance facilities with CA Indosuez (Switzerland) SA (the Claimant: “CAIS”) and with UBS Switzerland AG (the Second Part 20 Defendant: “UBS”).
Afriquia Gaz SA and Maghreb Gaz SA, the Defendants and Part 20 Claimants (“AG” and “MG”), purchased a cargo of butane from GP. GP assigned to CAIS the debt represented by the purchase price. GP issued its invoices to AG and MG on 23 July 2020 and CAIS sent notices of assignment on 27 and 28 July 2020.
However on 19 August 2020 AG and MG paid, by SWIFT, the sums due to GP’s account with UBS. The funds were received into one of GP’s accounts with UBS and then transferred to what appears to have been its loan or overdraft account.
GP instructed UBS to transfer the sums received to CAIS. UBS refused. It claimed to have been entitled to set off those sums against GP’s liabilities to it.
By Rule 20.1 of the Civil Procedure Rules, the purpose of Part 20 of the CPR is “to enable counterclaims and other additional claims to be managed in the most convenient and effective manner”. CAIS commenced this claim against AG and MG for the purchase price, a claim in debt. AG and MG denied liability but added (Part 20) claims against GP and UBS for the sums received, and in unjust enrichment and for liability as constructive trustee. Following the exchange of expert reports on Swiss law, AG and MG have accepted that their claim against UBS based on an alleged constructive trust must fail, and that the claim in unjust enrichment will only arise in certain circumstances.
GP is incorporated in the UAE. The sale contract with AG and MG contained an exclusive jurisdiction agreement in favour of the High Court in London. The Part 20 Claim Form was issued with the following indorsement:
“[AG and MG] are permitted to serve the [Part 20] Claim on [GP] pursuant to CPR r.6.33(2)(b)(v) and Article 25 of the Judgments Regulation because [GP] is a party to an agreement … conferring exclusive jurisdiction within Article 25 of the Judgments Regulation. [AG and MG] are permitted to serve the [Part 20] Claim on [UBS] out of the jurisdiction pursuant to CPR r.6.33(1)(b)(i) and Article 6(3) of the Lugano Convention.
The reference to Article 6(3) was a mistake for Article 6(2).
The Part 20 Claim Form against GP and UBS was issued on 30 December 2020, before the end of the Brexit transition period. UBS declined to instruct solicitors to accept service in England. AG and MG meanwhile on 20 January 2021 obtained an order from Cockerill J extending the validity of the Part 20 Claim Form. The Part 20 Claim Form was served or purportedly served on UBS, out of the jurisdiction, on 9 March 2021.
Crucially, the Court’s permission for service out of the jurisdiction on UBS was not sought. Counsel for claimant informed the Court that those representing AG and MG considered at the time that no permission would be needed, on the basis that jurisdiction under the Lugano Convention, which existed at the date of issue of the Claim Form, was preserved. Counsel also contented that even if permission to serve out was required and had been sought, it would inevitably have been granted, as questions of appropriate forum (considered in an application for permission to serve out) were not relevant in the context of the Lugano Convention.
UBS acknowledged service on 26 March 2021, indicating an intention to contest jurisdiction. Current judgment focuses on that contestation.
Under the European Union Withdrawal Act 2018, implementing the EU Withdrawal Treaty, an implementation period came to an end at 23:00 GMT on 31 December 2020 (a day after the claim form that initiated current litigation was issued; also known as “IP completion day”). During the implementation period, obligations stemming from international agreements to which the EU was party continued to apply. Until IP completion day therefore the Lugano Convention applied to it by reason of the EU’s membership of the Convention. That clearly is no longer the case.
Essentially, E&W CPR was amended to include transitional provisions in relation to service out of the jurisdiction, which specifically maintain the pre-existing position that permission is not required for a claim form issued prior to withdrawal where jurisdiction is based on Brussels Ia. However, there is no equivalent saving for claim forms where jurisdiction exists under the Lugano Convention.
Knowles J  on the issue of permission, reaches the same conclusion as Ms Dias QC in Naftiran (above): namely that the widened A6.33(3) CPR rule applies to include Lugano Convention claims. That rule now reads
“6.33(3) The claimant may serve the claim form on a defendant out of the United Kingdom where each claim made against the defendant to be served and included in the claim form is a claim which the court has power to determine other than under [the Convention on Choice of Court Agreements concluded on 30th June 2005 at the Hague], notwithstanding that (a) the person against whom the claim is made is not within the jurisdiction; or (b) the facts giving rise to the claim did not occur within the jurisdiction.”
Having decided the issue of permission, the judge still had to decide whether Lugano conveys jurisdiction in this case. A 6(2) Lugano provides that a person domiciled in the state bound by the Convention may be sued “as a third party in an action on a warranty or guarantee, or in any other third party proceedings, in the court seised of the original proceedings, unless these were instituted solely with the object of removing him from the jurisdiction of the court which would be competent in his case;”
A core issue in current case is that the main claim is settled ; can the third party proceedings still continue in the main claim’s forum? The judge refers to CJEU C-365/88 Kongress Agentur (a Lugano case) and  holds that there is sufficiency of connection between the claims for jurisdiction to be established; that there is no authority for defendants’ proposition that only ‘exceptional circumstances’ may justify third-party proceedings to continue when the main claim is settled, and that in essence  sufficiency of connection between the third party claims and the main claim suffice for the former to continue in the latter’s jurisdictional home.
There are echoes here of potential for abuse per CJEU CDC, however that route was seemingly not pursued and on the facts would seem challenging to substantiate.