In  EWCA Civ 2073 the Court of Appeal on Tuesday confirmed the High Court’s analysis of Vedanta. I discuss the High Court’s finding at length here. Best simply to refer to that post – readers of the CA judgment shall read Faux LJ confirming the implications of Vedanta. Note also the discussion on the limited impact of the Singaporean pre-action (particularly disclosure) proceedings: precisely because they were pre-action and not intended to at that stage launch a multiplicity of proceedings.
The Rome II argument was left untouched for appellant conceded that failure on the Vedanta point would sink the appeal.
(Handbook of) European private international law, second ed. 2016, Chapter 8, Headings 18.104.22.168., 8.3.2; Chapter 4, Heading 4.4.