The facts
Mr Mincione (the fourth appellant) is a British and Swiss national and a defendant in criminal proceedings brought by the Office of the Promoter of Justice (the "OPJ") in the Vatican City Court. The first to third appellants are companies/sub-funds controlled by Mr Mincione.
In the proceedings in the Vatican City Court, Mr Mincione is accused of having misused his position as a financial adviser to the respondent, the Secretariat of State for the Holy See (the "Secretariat") to defraud it and embezzle money since at least 2014. The Secretariat is a "parte civile" to the criminal proceedings in the Vatican for the purpose of claiming an indemnity in relation to the damage incurred as a result of the criminal conduct alleged in the indictment.
The proceedings in the English courts relate to the acquisition of a 100% indirect interest by the Secretariat in a property in Sloane Square pursuant to a framework agreement and a share purchase agreement (the "Transaction"), both of which contain exclusive jurisdiction clauses for the English courts. Although the allegations faced by Mr Mincione in the Vatican criminal proceedings range more widely, one of the allegations in those proceedings is that the Secretariat paid an inflated price for the property, with the surplus monies being diverted to the personal use of Mr Mincione and his associates. That allegation is the subject of proceedings in England whereby Mr Mincione and the other appellants seek (in effect) negative declaratory relief as regards their liability to the Secretariat in respect of the Transaction.
The Secretariat sought a stay of the English proceedings until the conclusion of the criminal investigation being conducted by the OPJ.
The reason for a stay at first instance
At first instance, the judge granted a stay of the proceedings, principally on the basis that the Secretariat had adopted a "neutral position" in the criminal proceedings in the Vatican by virtue of its role as a parte civile. The judge found that it would be "neither just nor fair" to require the Secretariat to answer these claims (at this stage) in circumstances where it was "hamstrung from participating fully by its proper role as a neutral party awaiting the outcome of a criminal investigation of alleged crimes in relation to which it would be the alleged victim, but of which it has no actual direct knowledge". The judge also noted that the party who is actually in opposition to Mr Mincione in respect of the issues raised in the English proceedings was the OPJ.
The judge's assessment of the Secretariat's neutral stance in the criminal proceedings was based on his understanding of the relevant documents relating to the Secretariat's registration as a parte civile. The judge had understood those documents to mean that the Secretariat had asserted a right to compensation in the event the criminal charges were proven, but had not taken a position that the charges were true. The judge reasoned that because of the Secretariat's neutral stance in the criminal proceedings, the declarations sought by Mr Mincione (and the other appellants) would serve no useful purpose. However, the judge did not dismiss the claims on the basis that the relevant circumstances may change by the time of trial, including, if the Secretariat ceased to maintain a position of neutrality in the course of its parte civile action (or in some other way). The judge therefore stayed the proceedings until such time as there was a material change of circumstances, with materiality to be judged by reference to the reasons given in the judgment.
The decision of the Court of Appeal
The Court of Appeal noted at the outset of its reasoning that the court has power to stay proceedings "where it thinks fit to do so" which is part of its inherent jurisdiction recognised by section 49(3) of the Senior Courts Act 1981.
A number of authorities cited by the Court of Appeal referred to the fact that (i) a case management stay should only be granted in "rare and compelling circumstances"; and (ii) there must be "exceptionally strong grounds" for granting a case management stay in circumstances where there is an exclusive jurisdiction clause in favour of the English courts.