If you can see canvas on that tyre, I'd sue Dunlop!
The legal position on cuts is......
A cut in excess of 25mm or 10% of the section width of the tyre , whichever is the greater, measured in any direction on the outside of the tyre and deep enough to reach the ply or cord would deem the tyre illegal.
As it's at max a 190 tyre, you have 25mm to play with..................