Defender steel door skins

[Grappler]

I have just realised my doors on 2012 Defender 130 are steel!
No magnet sticks to the doors on my 1997 Defender

When was this "improvement" :no2: introduced?

[Grappler]

The second search actually found a hit. I have my answer.

http://www.aulro.com/afvb/90-110-130-defender-county/171522-aluminium-body.html