first guess is EGR, look at blocking it, then look at injector seals :) also may be worth removing top hoze from intercooler incase one is collapsing restricting air flow, = not enough air to burn fuel and smoke

i'm pretty sure the white smoke will be un-burned fuel, does this clear once started and warmed up? though another cause is a stuck EGR, injectors may be leaking air past, or could be general compression issue, my first call would be injector test followed by compression

lubrication :) aside from that, check if the recall work's been done https://www.lro.com/blog/news/land-rover/1509/faulty-tow-bars-mean-major-land-rover-recall

MAP is seperate to MAF, maf is mass air flow, MAP is manifold air pressure

sounds like alternator, not charging battery so not holding enough charge to start

if you checked oil just after a run it will be lower then after standing due to the oil circulating around the engine so standing = higher reading then just after running or if your really worried http://www.theoillab.co.uk/product-category/oil-testing/engine/

nope lol even worse when you have to carry 5 bikes, though then the trailer comes in to it's own :D

i did not have it on a disco unfortunatly only had a renaxxxx at the time, there is an adapter for the thule velo compact https://www.thule.com/en-gb/gb/bike-rack/towbar-bike-racks/thule-velocompact-927-_-927 +...

https://www.thule.com/en-gb/gb/bike-rack/towbar-bike-racks/thule-rideon-9503-_-9503 that's the one i used to have, sturdy, but heavy and bulky, and due to how the door opens on the disco dont think you can get in to boot without bike removal something like this...

http://www.discovery2.co.uk/waterpump.html ther's info on a drin plug there :) does say plug can be stuck and require bottom hose removal fingers crossed for you :)

sounds like a pump problem :( ignore me as it's alllready been said, for some reason the page did not load the other replys properly lol

put in a dishwasher tablet, and run for a bit before flushing again

what code reader are you using as they look like generic codes....

the one u r hoping to look at last MOT was a pass, but as per mot history checker ""The rear chassis section is in an advanced state of corrosion"" also prev mot's seem to have mention of lot's of iron oxide too :(

http://www.autotrader.co.uk/classified/advert/201701241615100?onesearchad=Used&onesearchad=Nearly%20New&onesearchad=New&make=LAND%20ROVER&postcode=ne288nh&advertising-location=at_cars&radius=1500&sort=distance&model=DISCOVERY%202&page=2 galv chassis allready fitted :)