Red Rum is more likely to appear in Liverpool next week than NATS getting the Liverpool ATC contract at anytime this century.
Although there's a shortage of qualified and experienced ATCOs throughout the UK, there are plenty of wanabees available whom Peel could train (admittedly at some cost) at any of their airports over the next few years, move to Liverpool and retain under bonding.
Then there's the small number of ATCOs who constantly talk about moving and go nowhere....