It's definitely real. Pictures and more info in the latest issue of rail magazine. This is not a blatant plug for the magazine by the way. I just happend to have a browse of it before I did a bit of shopping in my local tesco today.
Am I alone in thinking photoshop and vinyl wraps have a lot to answer for, this hardly seems like a fitting or tasteful tribute. Though malachite green probably wouldn't have been appropriate on a 91.