Just done a little bit of a search to try to identify IDS’s Mog
It’s definitely an R reg as I’ve found a few photos on the web displaying it’s reg which makes it registered in 1997
I’ve also found a couple of references to it being a Plus 8
In mid 1997 MMC swapped from a single left exhaust tailpipe as the Chequers photo to twin pipes when they updated to the 4.6 litre engine
So my guess is that Ian’s is one of the last 3.9 litre Plus 8’s made before mid 1997
He’s had it a good long time as I’ve found a photo of him on Shutterstock with it dating back to 2002
So he may even have had it from new