An Employment Tribunal could make a ‘protective award’ of up to 90 days' pay for each affected employee. The amount will be decided by the Employment Tribunal, based on the extent of your employer’s failure and the circumstances.
IIRC The 90 days notice is not applicable once the company go into administration, Any unpaid wages and 'awards' will need to be claimed from the point of view of a preferential creditor. The problem is that an airline usually has few assets left after repossession of the fleet by the bank.