No it's not the adblocker blocking AoS Steve as it's server side, not my side. I don't see any adverts here.

What it might be is the server is blocking me because of the adblocker? But that would be odd . . . my network knowledge isn't what it used to be, so I'm clutching at straws trying to identify a pattern and thinking out loud.

My IP address being in Colchester occasionally is strange though, just checked it now and it's correct for my location. So it might be a Virgin Media thing, if they are for some reason dynamically reallocating IP addresses to different geographic locations to the user. That would likely throw up a red flag to the queried server.

I've never encountered it anywhere other than here though.