I use the paper Land Rover manuals, original equipment workshop and parts catalogue.
I find digital manuals to be a pain in the back side, its easier to bring a book with you to the garage or drive when doing work or take a few pages from the folder, I don't know if they have them for TD5 but worth checking. I gave around 50 quid for both mine on EBay and its the best 50 quid I ever spent on any vehicle.