Wait, what?? Whose bright idea was it to both store classified material in the cloud, and then announce it to the public? Yeah, this sounds like it's going to turn out well.
Also, their first concern isn't that they'll no longer have control over this sensitive data, but that it's with a non-UK based company. I mean, I can understand how that's also a concern, but I don't think it should be at the top of the list.
Oh well, I look forward to a massive classified data dump going public in a few years.
(Disclaimer: I am not a financial advisor / this is not financial advice)