Cardiff DOES offer competitive landing (and other) charges. And I would just love to see how many milliseconds it would take after the announcement that an airline's losses would be underwritten before someone else cried Uncle. This would be unlawful state support.
As for the 'Wales is a development area therefore it's all ok, honestly' argument - that was the basis of the Charleroi defence....
It didn't wash there, either.
TA