Thanks for your help. Had the same problem with the drivers door window not setting and making an ugly "clunking" sound when fully closing.
Stripped the door panel off following the RAVE manual advice (official Range Rover workshop manual - available for free download - search on Google) and removed the window regulator ( drilled out the rivets). Two teeth broken off. Fitted new regulator (£30 on ebay delivered) using nyloc nuts and bolts (apart from the front mounting point which was too difficult to do up a bolt on so riveted it back on). All fixed within an hour
