I'm going to put a punt on the airport being Amsterdam.
I'm sure I've seen something written in the past where Ryanair expressed interest in flying to AMS.
Also, Paris is already served via Beauvais/Vatry, Frankfurt via Hahn, Munich via Memminghem, Madrid in its own right and I very much doubt he has got hold of LHR slots!
The issue he will face at AMS however is KLM's dominance, especially on UK routes, and the already quite set in saturation of low cost carriers, namely Easyjet, Transavia and for the UK, flybe and Jet2.