Braking steering vibration.
 

Hi. Hope someone may be able to help me. When applying the footbrake there is a terrible vibration. I have replaced both track rod end and one inner tie rod but problem is still there..
When going at a walking pace no vibration at all.
Any suggestions please.

sounds like you have warped braked rotors. Jack up the car and rotate the wheels by hand to see if you can feel the pads hitting a high spot. It can be hard to tell if the problem is in the front or rear and this may help provide a clue.