Liverpool is constrained by the river around two sides and housing and a Tudor hall on the other sides so expansion is not possible. Think somewhere like Waddington, which is a long thin airfield site.
BAe is very sensitive about who it now lets onto its airfield.
I've known 'people' use Woodvale and Warton would charge an arm and a leg open out of hours, Blackpool would have been better but that looks as if it's closing slowly.