I believe the local authority/council oppose the spreading of car parks outwards from the airport. The option open to the airport is upwards, multi-storey. But we all know that if Cardiff can get away with a temporary solution then thats the way they go everytime(probably like most airports). Hence the years back we got called to fences that had been blown onto/into cars parked in the old stand 1 area. So at least they attach them to the ground nowadays
Ps BBC Wales 1:30 news features the Welsh air link, ref its 1st anniversary