okay well i jacked the car up, had a look under it and there is no sign of wear except for the inner splash guards which has partially ripped a little due to scrub and one fender clip which holds the top of the inner splash guards. I cut out the sharp bits on the inner splash guards so it doesnt come into contact with the tyres but i doubt that could cause it to take bits of my tyres out.

The marks on the tyres are in the same location throughout the whole tyre so im assuming its happening in one place.