That is the feed to the EGR cooler from the back of the oil cooler. When people do a complete EGR delete they remove the steel pipe from that stubby hose and either use a big bolt to blank it or replace it with a rubber blanking cap from the later TD5 which didn't have the EGR cooler pipe. You...

Helps if you give model / year.

It's a common modification and factory standard on later TD5s.

Belts don't come any better than Gates!

I'm afraid it doesn't matter what you have had to spend on maintenance it doesn't make it worth anymore than the market value of a 125,000 mile D2 with galvanised chassis which may make it more desirable and add 2k to the value.

How is the foam on the engine side of the bulkhead attached, can it be peeled off in one piece and reused or is it glued on and has to be scraped off in pieces?

I would definitely clear the cill and Aircon drains to eliminate them and move on from there.

I've had 6 TD5s 4 x 110s and 2 x D2 and not one of them has thrown up any "electrical issues at the drop of a hat" , in fact the only problems other than service items I've had is 1 X delaminated crank pulley, 1 X screw in core plug behind the exhaust manifold leaking , snapped exhaust manifold...

Most definitely.

But not because of reliability issues.

It had absolutely nothing to do with reliability which is purely a rumour touted by 300tdi owners who didn't want to move with the times as they were frightened of electronic engine management systems. The only reason the Army continued with the 300 tdi was because Land Rover were unable to...

Total waste of time , I've never seen a suspension top/bottom suspension ball joint with a split rubber where the ball joint wasn't on it's way out.

Do the standard door cart retainers not do the same?

Martrim do the factory spec 4 way brushed nylon and other materials in wider than normal size with complete kits available in the correct colours. https://www.martrim.co.uk/car-trimming-supplies/land-rover-headlining-kits.php

'too'

This was my leak.

Then yes it is a leak, you need a spray bottle filled with soapy water to spray the entire system, bags pipes and valves in the compressor box. Sometimes it's the bags but it could also be a pipe rubbing through and the plastic valve bodies are sometimes prone to cracking, spray with soapy water...

20:33 in, let down by the Police and he gets away with it again! https://www.bbc.co.uk/iplayer/episode/m001vf38/panorama-will-my-crime-be-solved

Well it shouldn't unless there is a fault with it!

Neither do any D2s fitted with air suspension.