The MOST fibre optic ring is being broken - you need to check the modules on the system are all working correctly. You can get a bypass prism for diagnostic purposes

Think the change happened at 2002MY with the new instrument pack with the black dials. Sounds as if you have the earlier level pump/sender unit and not the later one

It has a fibre optic factory fit stereo so it’ll be a tough job to replace but not unachievable but it’s costly with interface boxes etc

What does your radio look like currently? Do you have a touchscreen?

Sounds like you need a new latch if the wiring checks out ok

It’s a returnless fuel system so you should only have one pipe into the pump. Is the “spare” connection solid or open?

The strange sizes as you say are the standard sizes for flanged nuts and bolts which removes the need for separate washers making assembly at the factory easier

Located in rear quarter but you’ll need the aerials, coax, wiring and configuration changed for it to work - seems a lot of work for little gain Also it may not work unless it’s a Digital receiver. Tv was an option on RR Sport.

The water leak is coming in around the central high mounted stop lamp - quickest and cheapest fix is to use some silicon sealant to seal it to the body For the antenna then it’s the one on the roof and you get to it by removing the rear trims and then dropping the rear of the headlining...

The relay control on the facelift is in the door switch for the windows - when you operate the switch with the meter on the connections does the state change?

Press both the left and right mirror selection buttons to fold the mirrors - they may have been manually folded and need resetting

You need to drop the rear headlining to get to the antenna - remove rear pillar trims, boot seal, and headlining fixings and then carefully drop the headlining and you’ll see the antenna fixing - single bolt from memory

What car do you have? And year

Cut a hole in roof box for aerial to poke up through so it doesn’t lie underneath it or fit an aerial amplifier to the coax cable Also check the ground on the aerial base as it may be poor causing the loss of signal

Go to your local Land Rover dealer and ask them to get the code for you from the factory - cheaper and more reliable then online places

Do you have factory fit xenons? Not sure why the height sensors would go into rear diff as they’re only used for auto headlight levelling on xenons

depending what system you have you need to purchase a DVD map disc or if you have HDD nav you need to go to a LR dealer to have it updated by them. Go to landrover.navigation.com and it’ll help you work out which nav system and what update method you need

Do they flash on and off or on permanently?

The turbo parameters are stored in the actuator (upper and lower limits etc) and depending on the variance in the turbo could cause over or under boost and associated warning lights. Do you spend £85-£100 and the labour and hope for the best or do the job once with a warranty for £200+...

Yes that’s correct