Spoke to Tom last night, he was saying remove the entire shock from the bike, and then yeah just hit the bastard out. Apparently it is steel (trying to remember what he told me it was made of) and that it will be really tight to get out, but once it is out it will be a lot looser so for further removal.
May as well give it a go. They are obviously supposed to come out, so I duno, give it a go, and well if it looks like it is damaging it, then stop and we will have to think of something else.