Thanks everyone for your input into this topic. I have read all and can only assume that I had it installed correctly, as I had installed it in Mareeba and had hitched and unhitched the van many times in my journey down to Nanango and also driven many kilometres on varying types of road surfaces with out the hitch falling out. Surely if it was fitted incorrectly it would have fallen out well before almost 2k kilometres of travel.
After reading this thread I can't understand that Landrover still haven't recognised there is a serious and life threatening issue here. I have submitted a near miss safety issue on the towbar with the ACCC product safety department.

