I would imagine the brakes are quite easy to work on and nothing a decent garage couldn't cope with, especially in rural areas where lr's are more common. Could even try looking for a mobile mechanic?

put the tie wrap around the other way so it can't fall off, check the travel of the pedal that it moves ok. The proper clip I've seen is called a spider clip and is made of metal of metal I think and can fall off.

Accessible by pulling bumper down slightly. Need to get hand right in to feel them.

Two holes in bumper will allow decent socket to reach bolts. Clean threads and copperslip when rr fitting.

Irrespective of auto adjuster, are the drums adjusted. I adjust till they bind then back a bit. Mine felt sharper after the mot, so maybe a bit of harsh use may ease things up.

Maybe some one local to the seller could get you some photos and confirm its complete and condition

Post a picture of them, maybe someone can tell.

If easier then poke the cable under the side trim, push further under with plastic card (don't break your only bank card), rear side to side trim, as mentioned, is useful to remove though. i mounted my camera below the bumper but would like it higher for parking, looking down at the bumper.

I'd run a tap through the threads first, makes it easier to remove next time.

Proving it's wired in without removal of panels is impossible.

How bad is the heater, I'd look at heater matrix being blocked first, but the heater should be nice and hot. Flushing can push gunk into the matrix wgich may or maynot be able to be flushed out. What sort of lower temps do you get? Then any modification to help.

Another year on the books, great when they pass! Most brake rollers run in opposite directions, which means little or no movement on the propshaft or vcu. Can be demonstrated by jacking up rear wheels and turning, the opposite wheel rotates the other way.

Grey smoke is unburnt diesel. Turbo normally black smoke. Could be injector issue, over fuelling or timing issue.

As far as I've seen on gov site, no. Just says if fitted to test belts.

Although found this on gov site, https://www.gov.uk/guidance/mot-inspection-manual-for-private-passenger-and-light-commercial-vehicles/7-other-equipment You do not need to inspect: a belt fitted with no corresponding seat a buckle or stalk with no corresponding belt proving internet...

Seen something similar, I thought the official line was if there are working seatbelts then it should fail without seats. The given theory was someone could sit there with belt on and no seat.

In the first pic there is a place where it could clip to, maybe a vent for a vacuum pump, high up so it doesn't fill with water when wading through streams.

Are you getting a specific code, and what reader. Could be a specific LR code that is more descriptive. Hopefully someone will come along with more FL2 knowledge, but more info can be helpful. Do you hear the handbrake release and if so does it sound different, maybe one side releasing.

As bleeding again made it worse, that might suggest a bleeding issue, as you can get gears. What make of master and slave cylinder did you use? (although its not a slave I think its a concentric cylinder). There has been modifications to enable the pedal to push further into the master cylinder...

Offset by only wearing one sock and no trolley token