Thanks to all who offered tips for DUB.
Having spent a very disappointing day there yesterday (busy place but everything is FR or EI!) I got my images home, only to find that almost every single one is heat-hazed - from three different spots too!
In the air, on the ground; you name it, it's awful! Whether this is a summer thing I don't know but I'll be in no hurry to go back - even at FR's super-low fare of £2!!!
Be warned if you go in the summer!