I did a search and found these: first one is on Discovery:

Mark Hopkins - Water Ingress

Here's one on the DEFENDER:

Sources of water ingress in cars - Land Rover Defender Water Ingress Manual | Autosnewspaper.com

tHIS WAS MY SEARCH RESULTS:

land rover Water Ingress Manual - Bing

 

THE ONE ON THE dISCOVERY IS VERY INTERESTING READING. It discusses leaks arounfd the front windshield, the Alpine Windows, Sunroofs, and a new "Double Bubble improved rear cargo door seal.

I recommend all of you fellow Discovery owners take a look at these.

However, they fail to mention all the little holes under the entire bottom of the vehicle that you can see daylight thru if you remove the carpets andthe sponges located underneath, also known as padding.

 

thanks danny. really the rustproofing and leak proofing is endless.