Thanks to you both for the quick reply. I've taken off the nut and can see the spines but the collar will not budge at all. There's absolutely no give or sign it will come off at all and there's nothing to get any leverage off. Any ideas?

I bought a 1989 90 a few years ago which had a after market third party steering wheel. I am trying to fit an original LR steering wheel which I bought off eBay. I've searched countless forum messages on the subject and can only conclude that the previous owner has removed the orginal boss (or...