"...the essential question is whether there is a risk of injustice to one or both parties if it grants or refuses a stay."
"It is the settled practice to require security for costs to be given by an appellant who would be unable through impecuniosity to pay the costs of the appeal, if unsuccessful, without proof of any other special circumstance."
"The court may make an order for security for costs under rule 25.12 if- (a) it is satisfied, having regard to all the circumstances of the case, that it is just to make such an order; and (b) (i) one or more of the conditions in paragraph (2) applies; or (ii) an enactment permits the court to require security for costs. (2) The conditions are: (a) the claimant is (i) resident out of the jurisdiction; but (ii) not resident in a Brussels Contracting State, a Lugano Contracting State or a Regulation State, as defined in section 1(3) of the Civil Jurisdiction and Judgment Act."