Having experienced changing my wheel off road today with the poor oem equipment am looking to see if anyone can recommend a suitable soultion that will work for the RRS - preferably on road and off road.? Would prefer something I can also carry in the back easily.

Today in the end the oem jack was just about okay, but the oem wrench thing lasted thirty seconds as the end completely sheared off under hand pressure. The stealer clearly didn't use a torque wrench to tighten the bolts on the wheel at the first service.  2008 TDV6 WHITE/EBONY

http://www.rangeroverclub.org.au/

you could consider an air jack - http://www.air-jack.com - its been discussed a lot over on disco3.co.uk so may be worth posting on there for better feedback

Kaine