Yes, and I saw a different article (will try to find it) indicating that that it was sort of a permanent loan, and the return of the item was done in such a manner that the UK diplomats were flabbergasted and didn’t know quite what to do - I’ll try to find it.
Isn’t a “permanent loan” a oxymoron ? If it was, then it should not have been returned, but transferred to the National Archives like all valuable gifts.