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In a recent decision, the High Court considered the scope of sovereign immunity provided by section 1 of the State Immunity Act 1978 (the “1978 Act“): High Commissioner for Pakistan In the United Kingdom v National Westminster Bank [2015] EWHC 55 (Ch).

The court expressed the view that once sovereign immunity is waived by a State instituting proceedings, it is waived for the duration of those proceedings, including any new claims that the State could have predicted would arise from the original proceedings.

The discussion in this case sheds some light on the boundaries of an area of law that has seen limited judicial consideration. It remains to be seen whether Pakistan will appeal, and so give a higher court an opportunity to provide further guidance. For more detail on the case, see this post on our PIL Notes blog.

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