I can't remember what I did on the motorised sid to get access to rotate them / oil them.
It's a while ago. I remember I separated them via the single screw on the long linking rod, but my brain is empty after that - sorry.

For info they're not a Land Rover design, they're originally from Ford US or a Ford US supplier, but tailored to suit the Range Rover.
When I was originally looking for info about them I found various pictures of almost identical units (the brackets & motors - NOT the actual steps) on Ford Explorers, Rangers & Expeditions .

As an aside, the Americans complain about all of the same issues RR owners get with them  Paul,
2001 Discovery 2 TD5, 211,000 miles & climbing
2006 FFRR TDV8 Vogue 145,000 miles & climbing
Member of Midland (Land) Rover Owners Club, www.mroc.co.uk