Castlelake's £6.90 per share proposal, which the easyJet board had said it would be minded to recommend to shareholders, represented a 73% premium to easyJet stock's close on May 29, the date Castlelake first went public with its interest in acquiring the carrier. A central complication for any deal involving Castlelake involves an E.U. rule requiring that airlines flying within the bloc remain majority-owned and controlled by E.U. nationals. Castlelake structured its proposed acquisition vehicle so that its own stake would be capped at 49%, with the remaining 51% held by E.U. nationals — a structure easyJet's board had previously described as "opaque."