Thanks for all your comments. I have heard such a lot about gearbox problems, and how people have been running 2wd, and noticed the wind up when cornering sharply. Having discussed the whole thing with our local LR specialist we decided to give it a try, thinking that the prop could be easily be replaced anyway. Now I am so pleased with the results - free running and quicker getaway, and it irks me that the rear diff is spinning away doing nothing, and using fuel to do it (although only a tiny bit). You might say "Why not go for an ordinary car anyway?", but I like the Freelander for visibility, ride, and the seat suits my arthritic back (this is crucial).
I assume to remove the half shafts, one would have to fit short 'dummy' shafts, minus the UJs to hold the wheel bearings together?