I've seen the bigger black ants flying around in previous summers, but today I witnessed quite small flying ants. I don't think it's anything weird going on but I've never seen them before.
I was at the top of a hill and there was a swarm of insects. I thought they were flies until some of them landed on me and I could see they were ants. When I looked into the distance I could see a dark cloud which I assumed must be another swarm of these ants.
I asked Grok about it and got this reply: "The ones you saw sound much more like red ants in the genus Myrmica — most likely the common red ant (Myrmica rubra) or the closely related Myrmica ruginodis (which is more frequent further north, including Northumberland)".