I was thinking the along the same lines, along with predented panels, but I thought it may have been a bit "Defender". But being a Discovery, Im not sure if LR would rivet the door shut, perhaps they'd just fit a great big rubber seal like those around the windows, take the door handles off and market it as a 3dr.
That sounds like a dodgy car salesman line.
"See folks, excellent 5 door vehicle!"
*tugs rear door handle*
".....I mean, excellent 3 door vehicle!"