Had a run down to Leicester on M1 yesterday, the wagon was wandering well, found out why today, after some help for the name of the part thanks ed, sorry for dragging you out of bed this morning.
It was both bushes in the panhard rod from the front axle to the body, bottom one collapsed almost completely and the top not much better
lovely drift with the body from left to right when trying the free play the 3-4 inches
Good news was one hours work and the use of a press, prob solved