Decided to do an epoxy repair the the steering, once the wheel was off and the front washer removed I could just see that the bottom screw bolt of the 4 bolts that hold the steering shaft to the whole assembly mount was loose. Coupled with the housing being fractured at the middle screws on both sides meant I had play in it fro and aft and left and right. Just managed to get Allen key on the bolt to tighten it which cured stopped the play in the steering. However the fractures were still there. The right bolt I could not access without taking the whole pedestal apart.
I took the top part of the housing off, cleaned everything up prepping for epoxy. I then epoxied a horse shoe strap of aluminium over the whole mount and added a couple of aluminium angle pieces over where the fractures were. It all seems to be holding nicely.
I wonder if the reason the fractures occurred was because the bottom bolt was loose allowing that bit of play such when I hit a rock going backwards there was enough play to cause the fractures.