This article was posted on FB. Again I was clueless who this person was, so Wikipedia revealed the following:
Judging on the comment "on his sixth Ferrari" I guess he was particular fond on this brand. According to one of the 365/400/412 VIN historians:
"I believe it is #18273 in the photo, and that was his second 365 GT4 (first unknown ID). He later owned #20527 (400GT). #18273 has not been heard of for many years, but #20527 is still around."
Other then this I couldn't find much more related information about him and the 365/400 ownership.
His name was not listed on this page either:
Update 5-11-2106: By surprise I received this additional information:
He had a 330 GT 2+2, 365 GT 2+2, Dino, Daytona Before buying his first 365 GT4
2+2. He covered 40,000 "virtually trouble free miles" and paid £15,000 for it.
He then traded it in for the 365 GT4 2+2 in the photo in the Radio Times
article, before buying the 400 GT.