Sorry it was you saying that they are not OBD2 compliant that threw me off. An OBD2 scanner won't talk to the ABS controller on any Rover.
Anyway as of today pscan can now power bleed the ABS controller on the 75/ZT and it can also access the GM6 BCU.
The current list of 75/ZT support is here:
http://pscan.uk/features/75zt.html
There will be more updates over the next few weeks and months as I get further into the various cars that have come my way recently.