Having replaced the front ARB bushes a few weeks before I finally got round to changing the rear ones. These turned out to be much easier than the front ones. It was a simple case of undoing both retaining brackets, pulling out the old ones and putting on the new ones. In order to get the brackets back on I found that I could use the trolley jack on the ARB to hold the bushes in place.
You can easily spot one of the new purple bushes in the pic below: