On DUB traffic, majority is US originating and not coming from the UK side and if you put top transit routes into a league table only one US city generates robust demand to MAN and it's got a very low frequency currently ex MAN and no major US carrier based flying T/A (I'm sure people can work it out!)
Putting it into context LHR-DUB-JFK traffic is significant and that is with an hourly LHR shuttle.