General Officerwhat's a GO?
that's likely just Pope making an assumption of why the photo was taken down
During his time with the ministry, Pope had a blown-up copy of the photograph on his office wall until it was personally taken down by his superior. He recalled: "My head of division removed it and put it in his drawer because he was convinced, wrongly in my opinion, that it showed a top secret prototype craft.
He states it was taken down because "he," his boss, was convinced it was a secret prototype craft. Pope didn't agree with him, but that's why it was taken down. Pope says essentially samething on his website.