Thanks for reply Peter. I don't think i was very clear in my original post. What I mean is, do i need to remove the tension from the wheels, suspension and anti rollbar by jacking the car up? I can access the ARB's without jacking it up.
But having said that i now believe i may have to jack the car up because looking at the new bushes there is no split in them(polyurethane bushes). So I think I will have to slide them down the anti roll bar from the end. I was hoping that they would (if they had a split in them) just push on.