You probably are right Alan , I should of done that at the start. That ship has sailed I am afraid. I can't get the digger into that corner now so it would have to be done by hand, and that is beyond me to dig down that much, and I would have to cut back the ground above I think too. So rightly or wrongly that's not going to happen. The wall is not going to collapse its only holding back a small amount of ground, with good drainage behind it. Different story if it was cut into a hillside like that, it would blow out with a big rain for sure.