Relocate the cargo centre to the other side of Altrincham road (cargo city, plenty of room left !!) only the bonded warehouse actually needs to be close to the apron. Then concrete the whole area doubling the size of the west apron. Then while you are at it carry on around sun bank lane relocate the RVP to south side and concrete that area as well. That should sort out the lack of stands, come to think of it you could fit a lot of cars on that space !
