Urgent Help Please - Server Disconnects

Playing on a Win11/Steam PC, Steam shows as being online so I click on BF6 and game boots up but for the last 2 days every time I try to start a game I get a "Server Disconnect" message within a couple of minutes of entering a game or even just sat in the menu screens.

It will do this several times then eventually quit to desktop where Steam briefly shows "not connected" at the bottom of the app.

I have a full fiber broadband service that is working fine with Internet, streaming and other games etc it only seems to be EA games that are an issue for me and that started recently.

I have no VPN active when playing I have tried a number of "fixes" found online including DNS changes etc

I have reinstalled both the Steam Client and the game but it makes no difference.

Router restarts make no difference either.

I have been playing on this setup since I purchased the game in October and have had absolutely zero issues until now...

Error code 1:85008S: 17862870170:-2146566144Q