Thanks for the link, Data Dad.
As far as I can see, the document covers a request by NATS for an injunction to be placed on GAL preventing them going ahead with the new contract with DFS until the complaint by NATS regarding the tender process is settled by a trial in court.
It also states that if GAL win then NATS have to pay damages but if NATS win then instead of damages GAL has to award them the contract.
I can't see anything that tells me what NATS complaint about the procurement process actually is. Maybe I just missed it!