“If the sovereign, acting through her executive, chooses to recognise and treat somebody as the executive authority of a foreign state even though the constitutional law of that state would or might say otherwise, that is her prerogative. She is not bound by such considerations and it is not for the courts to second-guess her choice by reference to such considerations. Hence, for example, in Sierra Leone Telecommunications Co Limited [‘Sierratel’], where the law of Sierra Leone governed the question of who was authorised to represent the state-owned plaintiff company, but applying that law involved identifying who was the government of Sierra Leone, that sub-question was a matter for the ‘one voice’ principle of English law …”