Here’s the recipe for  EWHC 975 (TCC) Lungowe v Vedanta at the High Court.
Obtain one lb of C-291/02 Owusu: European authority: forum non conveniens has no place in the Brussels jurisdictional regime; particularly now in Article 4 of the Brussels I Recast for as Coulson J points out at 57 in his judgment in Lungowe, Articles 33-34 of the Recast Regulation do foresee consideration in the event of parallel proceedings outside of the EU.
Mix with one lb of Chandler v Cape : English authority: parent companies may in circumstances be held liable for the actions of their foreign subsidiaries; referred to with approval by the Dutch Courts in Shell.
Have Zambian claimants in a case of environmental pollution employ Article 4 to establish jurisdiction against a holding company established in England. The company is a holding company for a diverse group of base metal and mining companies, including the second defendant, Konkola.
The fact that Vedanta are domiciled in the United Kingdom is, evidently, one of the principal reasons why they have been pursued in these proceedings (see Coulson J’s acknowledgment of same at 76). This is a manifestation of forum shopping which the CJEU has certainly encouraged. Moreover, as Coulson J suggests at 77-78, claimants also wish to pursue Vedanta because they are seen as the real architects of the environmental pollution in this part of Zambia. The argument is that, since it is Vedanta who are making millions of pounds out of the mine, it is Vedanta who should be called to account. On balance, the use of Vedanta as an anchor defendant can hardly be seen as a malicious ‘device’ or an abuse of the anchor defendant mechanism.
On that issue of abuse, reference is made by the High Court to Freeport and to CDC at the CJEU. There is no suggestion of course that either are direct precedent for the anchor defendant mechanism in residual national private international law. (Which is the case here: for the Brussels Recast joinder mechanism in Article 7 most certainly does not apply to defendants domiciled outside of the EU). It is telling therefore that the Court does refer to them here. (And inevitably raises the question whether English Court will continue to do so after Brexit).
European private international law, second ed. 2016, Chapter 8, Headings 188.8.131.52., 8.3.2