Speaking from when I owned a D1 - the best way to get more articulation was to remove the anti roll bars ....

Be interested to see if much else changed... Land Rover Addict
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2009 5.0V8SC Autobiography
2006 4.2V8SC Autobiography
2004 4.4V8 Vogue

I can see how an anti-roll bar reduces wheel travel considering their shape. However by just making the A/R bar stiffer (usually just a bigger diameter / wall-thickness pipe/rod used) the wheel travel should not change. So I am quite sure that they did some more work to the suspension set-up than just put anti-roll bars in.

Any way, I did some "testing" today and my S/C corners quite flatly, there is of course some roll but no way anyone can call it excessive. It is more than say a Cayenne though. MY 2010 5.0 SC Galway green and sand interior!!
Have the Faultmate MSV2 Extreme to be tinkering with the settings etc. !!