Just remember - the sun always shines in Arizona and in the UK this might be a wee bit more technical in the rain and an RRS2 and probably RRS1 with e-diff would handle this as easily.

 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
2018 Melting Silver Mini Countryman PHEV - soon to be replaced
2015MY Corris Grey SDv6 HSE Dynamic, the best car I have ever owned, totally reliable only a cou0le of rattles in 3 years, now no longer in my care
Also in my garage is a 1996 TDi300 Defender 90 County HT made into a fake CSW

RRS1 might struggle with ground clearance a touch. The D5 and RRS2 have more clearance as standard. Other than that, agreed. 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

Not with the iid tweaks  2003 BMW M5 - 5 Litres of V8 Optimax Slurping Goodness in Carbon Black

2013 SDV6 HSE Black Edition- Orkney Grey with Ebony & Ivory. LR Facelift RAI, Genuine G4 Expedition Rack, 4x Warn SBD-160 Spotlights, Warn 9.5XPS Winch, Mantec Underbody Protection and Sump Guard, Full Easy Lift Suspension Module, LR Light Guards, Light Force HTX230 Hybrid spotlights, 18” Compomotive PD1881 on 265/65/18 BF Goodrich KO2, ARB fridge, TuffTrek awning 😎

Even then I think Chris, although not entirely sure. Either way, the D5 driver doesn't need an IID to get big clearances...  2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

226mm Vs 283mm for Disco 5. Add another 50mm to the 226mm on the iid and your not far off on ground clearance. If you then factor a bit more in for the rolling radius of a 55 profile A/T tyre and I would say your about there  2003 BMW M5 - 5 Litres of V8 Optimax Slurping Goodness in Carbon Black

2013 SDV6 HSE Black Edition- Orkney Grey with Ebony & Ivory. LR Facelift RAI, Genuine G4 Expedition Rack, 4x Warn SBD-160 Spotlights, Warn 9.5XPS Winch, Mantec Underbody Protection and Sump Guard, Full Easy Lift Suspension Module, LR Light Guards, Light Force HTX230 Hybrid spotlights, 18” Compomotive PD1881 on 265/65/18 BF Goodrich KO2, ARB fridge, TuffTrek awning 😎

Maybe be we need a forum outing to try out a comparison - standard RRS v iiD upgrade v L494 standard?

I know some lovely forest drives on the West Coast of Scotland where we could do one, but getting the land owner's permission would be a problem - Forest Enterprise (old Forestry Commission) up here is getting very risk averse to having what they classify as Motorsport in their forests after some headline grabbing deaths on various rallies in the last couple of years unfortunately 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
2018 Melting Silver Mini Countryman PHEV - soon to be replaced
2015MY Corris Grey SDv6 HSE Dynamic, the best car I have ever owned, totally reliable only a cou0le of rattles in 3 years, now no longer in my care
Also in my garage is a 1996 TDi300 Defender 90 County HT made into a fake CSW