As per this thread: https://z22se.co.uk/viewtopic.php?t=3651
I've replaced Simon's Anti-Roll Bar Link Rods for him.
This is what is required.
19mm socket
Set of Maul Grips
Some penetrating oil
Jack
Axel Stand
And a lot of graft
So, first thing I did was to remove the wheel:

The anti-roll bar is held in place by 2 bots, one at the top, and one at the bottom:


You will more than likely need to soak these nuts for about 15 minutes with some penetrating oil, as they will probably have ceased on.
Another problem is once the nut is spinning, the socket itself starts to rotate inside the ARB, so I had to clamp the other side with some maul grips.
Once you have the old ARB off, it's time to fit the new one. You'll need to raise the brake caliper up, using a wheel jack, so that you can place the new threads through the holes.

Once, thats in place, it's simply a case of putting the nuts on, and tightening:

Refit the wheel, and you're then ready for the other side. Job done.