Many moons ago I used to buy and sell lots of Rover 200s and 400s about J reg to W reg and the majority of them had failing window mechanisms. You would put the window down and it would fall off the runner of come out of the frame on the way up. A decent piece of wood to wedge the window up and inner case back on with the switch disconnected was what I always found when "investigating" the fault! No good if you use drive throughs tho!
