The long term survival of airports like CWL and NQY is diversification into other areas to make the whole facility pay its way, whether those be aviation related businesses or not. Revenue from passenger traffic alone will never be enough to make the facility profitable unless South Wales magically increases its market numbers.
That's it I am off back to Canada,where a lot of tinier airports than Cardiff survive from just a tin shed and do not cost tax payers millions of pounds or dollars, see you all next year!