All sorted now, thanks guys!
Managed to find a great place for parts in the process, JL Services in Willenhall.
I decided to change both rear half shafts and drive members in th end. I phoned around fruitlessly, land rover wanted 77 squids not inc vat just for the l/h shaft alone!!!
In the end I got both shafts, two drive members, two gaskets, two circlips, two caps and two litres of diff oil for £102!!!!!!
I'm now a happy teddy, speshly because it's also cured the little thump when taking up drive.
Fookin brill lads, thanks again!!!!!!!!!!:5bcheers2: