Flight Radar 24

[NotExactlyMrsCurrentAffairs]

Just had this plane go over, unfortunately didn't see it but sounded loud.
Had a quick look on the app.
Still none the wiser.

If Flightradar is reporting it correctly you might see two more aircraft flying with it soon.

My guess would be a military plane given the flight path and the lack of data. There are several RAF bases in the area where it first appears. It has flown to Pembroke National Park, flown around a bit and then headed back to base.