Incidentally, I wonder will the airport try to fill the soon to be vacant Gatwick route to cater to the point to point traffic to areas south and south east of London that may not want to fly into Heathrow?
Difficult to see who would take it on though. I couldn't see EasyJet entering the Irish market again. BA obviously won't. Wizz maybe - they have served Cork previously? Or might Ryanair try a W route from Dublin - you wouldn't put it past them.
The best outcome I suppose would be if the Heathrow route was successful enough that Aer Lingus felt they could operate both Heathrow and Gatwick daily on W routes from Dublin.