I went to get a wheel alignment at pedders they have informed me that the adjustment bolts that attach the wishbone to the chassis are siezed inside the wishbone bushes anyone elsehad this issue
One of the tricks I have learnt over the years is any bolts that are exposed to elements I use Permatex Aluminium Anti-Sieze Lubricant. This helps when needing to undo the bolts in future needs.....