IBRAHIM TANKO MUHAMMAD, JSC (Delivering the Leading Judgment): This is an interlocutory appeal by the appellants against the Ruling of the Court of Appeal, Lagos Division (the Court below herein), delivered on the 12th of March, 2012 in Appeal No. CA/L/284/2011, between the parties herein. The Court below dismissed the appellant's application of 7th March, 2011 wherein it sought leave of the Court below to adduce further evidence. That dismissal of the appellant's application by the Court below is the subject matter of this appeal.
SUMMARY OF FACTS
By a writ of summons of 22/2/2010, the (plaintiffs) respondents (herein), instituted an action against the (defendant) appellant (herein), at the Federal High Court, Lagos (trial Court), alleging that:
a) "Sometime in 1979, the Federal Government of Nigeria nationalized all the assets and interest of British Petroleum Company Limited (BP) and British Petroleum were compelled to leave Nigeria.
b) In 1990, BP informed the respondents that it was …