Been seeing a lot of activity in UK airspace over the Irish Sea between the hours of 4am & 6am. Can anyone else confirm the similar sightings?

Been taking notice that they mostly are East-West bound, West-East bound & the odd time North bound… They are far too high to be commercial aircraft… I’m also sure I seen an almost 90° turn in the odd one at times… I am based on the South East Coast of Northern Ireland…. I have no way of recording my sightings because my phone isn’t that great.

Cheers.