Well said Bagso, and why not stop BA and Virgin offering any connections via Heathrow! That'll learn them. Then anyone who was looking for a good deal in Economy subsidised my the suits on expenses will be forced to fly..... er from Dublin with Aer Lingus? Sorry I appear to have missed your point. Again.
Irish jobs for British workers? I am very confused but bagso is right. Frequency, connections and more jobs for UK based flight and cabin crew are bad. Somehow. Best to spread it around "fairly". Somehow.
Denying feed to MAN airlines using LHR won't mean they'll add capacity into MAN you know.