“That requires an assessment of the practical as well as the legal effect of the assurance in the context of the nature and reliability of the officials and country giving it. Whilst there may be states whose assurances should be viewed through the lens of a technical analysis of the words used and suspicion that they will do everything possible to wriggle out of them, that is not appropriate when dealing with friendly foreign governments of states governed by the rule of law where the expectation is that promises given will be kept. The principles identified in Othman, which are not a check list, have been applied to assurances in extradition cases in this jurisdiction. A court is ordinarily entitled to assume that the state concerned is acting in good faith in providing an assurance and that the relevant authorities will make every effort to comply with the undertakings, see Dean (Zain Taj) v Lord Advocate[2017] UKSC 44 ;[2017] 1 WLR 2721 at [36].”