Hoping you can help, I've searched for hours with no luck.

My 4.4 MY05 and I have done lots of good offroad, but consistantly during tough climbs with traction issues, the L322 reduces power/throttle by itself while I am trying to effect 70-100% accelerator pedal.

Ive found this with and without DSC.
Ive also replaced the Fuel Pump and Filter.
It FEELS like somthing the FF is doing on purpose.

Has anyone else experienced this, does anyone know why?
Thanks  L322 4.4 Vogue MY03 - Her name is Bulletproof .... you already know she's not
L322 4.4 Vogue MY05 - Sold to my brother
P38 4.6 HSE MY97 - Regretfully sold

Have a squize around rangerovers.net. I vaguely remember a story about this that even with DSC off, there is still some traction control going on in "difficult condtions. Mainly dealing with wheel slip.

What are you doing anyway, trashing around Fraser Island ????? MY 2010 5.0 SC Galway green and sand interior!!
Have the Faultmate MSV2 Extreme to be tinkering with the settings etc. !!

Just remember that is a fly by wire throttle, so at best flooring it is just a harsh request than an actual certainty. Seems like the LR engineers were thinking they know better than you? 
07 Supercharged - Still breaking her in!

Boot soundproofing part 1 - http://www.fullfatrr.com/forum/topic15612.html
Custom exhaust - http://www.fullfatrr.com/forum/topic15296.html
18" wheels for Brembo equipped cars - http://www.fullfatrr.com/forum/topic15052.html

Thanks, I've searched RR.net, but couldn't find anything.

someone had experienced this, please let me know.
It reduces power to what feels like 30%, when you're giving it a bootfull, trying to find Traction on a tough slope. L322 4.4 Vogue MY03 - Her name is Bulletproof .... you already know she's not
L322 4.4 Vogue MY05 - Sold to my brother
P38 4.6 HSE MY97 - Regretfully sold