Continuous crashes in BGs

So, I seem to be getting these constant crashes (disconnect entirely out of game - back to login window) whenever I queue and enter a BG.

Ive already tried downloading a clean version of the game, not running any wod models or other similar addons.

I recently managed to complete one Isle of Conquest after I had tried turning down all of my video settings to the lowest possible. But when I tried queuing for WG - I crashes as soon as the game began.

I have been using Vuhdo for raid frames (seeing as its built in to ElvUI) and was wondering if the game's attempt at rendering data from xx people might be the cause of the issues?

So in essence - how should I go about trying to identify the cause of all these problems? What are my options?

Thanks in advance for any help or pointers that you can give me

Well, the first step of troubleshooting is disabling all your addons.