high ping issue when connecting to NA servers

hi, having a similar issue to some of the threads i've looked through here - although my issue specifically is that I'm having high ping when connecting to NA. I'm from the UK and my ping to my own servers are fine, however when trying to play with friends on NA, my ping is now locked at around 140ms. As you can see in the 1st screenshot, I used to get 90ms to East, which geographically is the closest to me. Yet now for some reason it's saying US Central is my lowest ping. I don't have a VPN installed so that's not the issue. I also just got done updating ALL my drivers (GPU, network, audio, literally everything) and it's still a solid 140ms. I'm wired in via ethernet cable, and I have 1gig up/down so I know my connection isn't an issue either. I've tried ping tests on my browser and those are averaging 90-108ms to N. Virginia as well, so I'm assuming it's something on RIot's side but this has been a thing for maybe a week or so now (which is when I first noticed it after taking a hiatus of a couple months from the game) so I don't know if it might have been an issue for longer.