Does anyone know what bridge this is fitted to my guitar? And also how to go about adjusting the action? I am not sure what screwdriver/tool will fit.

I'm not sure on the model. I am almost sure you don't use a screwdriver to adjust the action though. Loosen the strings and turn the knurled screws at the bottom and they should raise or lower on that side.
Haha yeah, I remember when I got this guitar looked at the guy said something along those lines...