Wasn't sure whether to put this in the FR24 thread but figured it needs a bit more than that.
Aer Lingus and Ryanair flights typically route from LGW - DUB like this. Depart to the west or the east, fly to the west, over Bristol to Aberystwyth and up to Dublin.

This has been the case ever since I've been flying from Gatwick.
Over the last few weeks on Flightradar, I've noted Aer Lingus flights are still using this routing, but Ryanair flights now go north over London. They take off, gain height, go right over the center of London and route north to Liverpool/Manchester before heading into Dublin from the east.

This isn't just one flight, check out last weeks FR119 and FR143, and FR117 too.
I'm sure there are "operational reasons", or maybe its to do with London airspace reconfigurations... but if both Ryanair and Aer Lingus were doing it, I might believe that. But its ONLY Ryanair that I can see. Its added 10 minutes to the flight time, and probably increased fuel burn. Not the end of the world on either count, but interesting.
Sure, it makes for a more scenic flight but I'm just wondering if anyone knows why this change was made or when it started.
Oh yes... flights from Dublin TO Gatwick are unchanged.