Under “additional equity support”, the CAA said: “Given the present crisis facing the aviation sector… we cannot at this stage rule out [Nats subsidiary] Nerl requiring further support from the providers of equity finance.
“This could either be in the form of foregone dividends, new equity injections, shareholder loans or guarantees.”
Graham Lake, former head of the global air traffic controller trade body Canso, said: “For the world’s airspace managers the revenue shortfall is already in excess of $11bn [£8bn]. The owners of air navigation service providers face the inevitable prospect of either ensuring that funds are available, or making deep cost cuts.”
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