Jurisdiction — Nationality principle — Contract between plaintiff and defendant company registered in England — Non-payment of moneys due — Plaintiff commencing action in England — Whether English court possessing jurisdiction — Jurisdiction clause in contract — Exclusive jurisdiction conferred on Angolan court — Application of Portuguese law — Proper law of contract — Angola gaining independence since date of contract — New Constitution — District Court of Luanda now applying Angolan law — Article 58 of Constitution enabling change of law — Whether clause 14 of contract still applicable — Discretion of judge — Whether “just and proper” to allow action to proceed

States — Continuity — Angola — Former Portuguese province — Angola becoming sovereign independent State in 1975 — New Constitution — Popular Movement for the Liberation of Angola assuming power — Recognition of Angola by United Kingdom Government — The law of England