No the 'in gear' bit is not correct. The four wheels are connected together by differentials IRD and propshaft. The gearbox connects the engine to the whole lot. One wheel up passes all the torque through the rear diff then the VCU and ends with a stop as the front wheels are on the ground...

Does the engine run? As above, the disc by your finger is loose to turn. It acts as a spacer to allow clamp to pull tight. If they are wet when removed they may be stuck open or some other reason for overfuelling but let us know if it runs first and why removing them.

Probably this... https://ebay.us/m/c2jj6U

They have contacts on the elbow bit that break. Not sure why they are made with a contact rather than a continuous strip? Someone knows. JLR ?!?!?

Sounds like the bulb holder see my post above. Swap it for other side and if that solves it then simple and cheap to replace.

Some copycats out there ! Best form of flattery !! https://www.autocar.co.uk/car-news/new-cars/freelander-due-uk-return-electrified-4x4-jlr-design

The holders go open circuit on the rear lamps. If a new bulb doesn't fix it and you feel adventurous, swap the bulb holder from the other side and then you will know without any test equipment.

And the winner is Found the bugger too. No speed camera today.

"What is the story" anyway ! Gotta look out for Plum and the speed camera.

A better clue. This isn't a spot the differences @kernowsvenski !!! 800 miles so far !

Usually change seal when you change driveshaft as the lip goes hard and extraction of the shaft can damage it. Cheap to do while shaft is out. Don't tell us they left a leaky seal fitted with a new shaft !!??

Bit of history in this one. https://www.ebay.co.uk/itm/256918578638?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=tBAMRnBsT7K&sssrc=4429486&ssuid=b5qQSb6hQNK&var=&widget_ver=artemis&media=COPY

Easy to damage ABS sensor cables when changing driveshaft. Looks suspiciously like they might have damaged it. Some folks don't unplug and stretch cable to take driveshaft out. Worth checking the plug and socket are good in the wheel arch. Sensor is not too bad to change yourself. Yours is an...

This may help. Several ways of doing this. I prefer the later with the hose size increase. Especially on an Automatic. https://www.landyzone.co.uk/land-rover/fuel-burning-heater-still-on-with-temperature-normal-solved.395532/page-2