Who in America took control of some U.K.'s Gold Reserve?

In other words, a couple of clicks in a bank's spreadsheet caused the biggest fluctuation in Britain's trade figures in modern history. At least that's the most plausible explanation.

Though it raises further questions: Why? Is the bank in trouble? And who owns the gold anyway? And is it just a coincidence that all of this occurred as The Fed was forced to unleash unprecedented liquidity to support the repo market...