I’m not expecting much back on this one but it’s worth a punt!
At about 13:35 I was in Murlough Bay near Ballycastle. Sky gazing as you do and saw an aircraft going over. No contrails and strangely no usual aeroplane shape. It was hard to describe. It was incredibly still day but no engine noise. I considered it may be a drone but usually you hear them before you see them-again nothing with this. It headed on a straight line south west. I had no signal at the time so couldn’t check the usual apps. FR24 had nothing on playback
Cheers in advance