Today the following happened.
Engine management light on, engine fault gearbox fault and park brake fault on message board, central locking going nuts with no key in ignition, also if locked hazards keep flashing.
Have taken battery off, seems magic eye is black and not green, going to get it tested as car won't start.
Used it first thing this morning so I know mechanically its ok, could a duff battery be causing all this?
Never had any off this before so could a duff battery cause this?

Cheers, taff. Range Rover Vogue Classic 3.9 V8 1992
101 Forward Control GS 1977
Range Rover Sport SE 4.4 V8 2006

CAN BUS issue...

If the hazards are going, and doors lock/unlock themselves, it is a communication error, whixh is part of the CAN BUS network.

It can be a long winded process diagnosing the root cause of the issue, especially with an intermittent fault as yours would appear to be

Feel for you there Taff....

 2005 Range Rover Sport TDV6 HSE in Artic Frost. 20" 2010 HST Alloys, sidesteps, Hawke tips, plus minor bits and bobs along with a remap. Four spike spiders ready for the Alps again now tucked up in their garage boxes...

Found problem, a connector amongst the wiring behind the battery had come apart, plugged it back in and all back to narmal  Range Rover Vogue Classic 3.9 V8 1992
101 Forward Control GS 1977
Range Rover Sport SE 4.4 V8 2006