UKC

Is there any significance in it being from Mozart's Requiem?

Sounds like a mad use of it to me.

I haven’t encountered this, but if you think about your question for even one second, you’ll possibly reach the same conclusion that I’ve reached, which is that someone selected this and probably didn’t do it randomly or just based on the melody. 

Sounds like a perfect choice to me for such a sad national tragedy

Just a spot of backward crosswording.

Terribly sad music, perfectly apt.

I think just a tone accompanied by "We Apologize for the Loss of Control.  Normal Service will probably not be resumed."

I Want To Break Free (Queen) would have been even better; the lyrics fit perfectly.

On my blog for 24 June 2016 I put up the Funeral March from Beethoven's Eroica symphony (it's still there). The reason I chose Beethoven, of course, was that Brexit overthrows the central European ideal expressed in his Choral Symphony that 'All men shall be brothers.'

Breaking free from the EU free trade area and freedom of movement, I suppose.

That would be the final movement of Beethoven 9, then??? (ak.a. the european national anthem)

I thought it was a great song when I was about 16 and wanting to break free myself, but without any idea of what would be replacing what I had and whether I would be able to cope with it; I see parallels!

Got along without you before I met you, gonna get along without you now, Trini Lopez, Tina Charles, UB40, Viola Wills and dozens of others.

Freedom's a word I rarely use without thinking.