A report in today's 'Flight International' states that Sky Europe are trying to re-negotiate the terms of the covenants on their aircraft leases, as the current covenants have been breached.
Although not apparently viewed as critical by GECAS (the lessor), breaching of any covenant is bad news for a public company. Sky's fourth quarter results looked favourable, at least according to the spin they released them with, so hopefully this is a blip rather than an omen.
They have also decided to sell the two aircraft they currently own.