The purpose of marketing an airport is to attract its customers. The customers of an airport are the airlines that may be attracted to use it not the passengers. It is for the airlines to attract the passengers. Airlines will put their business where they feel they can make the most profit or attract the biggest opportunity to do so. Cardiff is and always has been marginally located with poor access and that has not changed since my days arranging flights from there over 40 years ago. There are many airfields that are making good profits and if Cardiff wants to improve in this regard the best way is to attract other businesses that contribute to the bottom line in ways other than passenger flights. 25 years ago I was managing director of an airline based at Cardiff, although I have been retired ever since the problems seem exactly the same today as they did then and I don't see any signs of them changing.