Thanks for the replys

Konis are brand new and do pass the bounce test, I replaced them as I thought this would improve things.

Calipers front and rear are also new so isnt that, I dont know how to check the steering rack but a local garage say that is also fine.

Tracking I have had checked and set up and was fine then but because of this problem i think its gone out again.

Any other ideas, some one told me it might be the arms but they didnt go into much detail so not sure what they mean?