I'm rather cynical about suggestions that SOU or EXT might close forever as airports. Places like Lydd, Cambridge, Norwich, Coventry, Blackpool Humberside, Teesside, Swansea, Prestwick, Dundee, Derry and others seem to carry on somehow
Perhaps a debt restructuring event might see the current owner lose their ownership to creditors. Perhaps the airport might close for a month while the airport under new ownership is relicenced by the CAA. But would SOU or EXT airports really close permanently with the consent of local and national Govt ? Seems dubious...