Some sort of boom heard over central England.

Hey guys please be gentle as this is my first post!
I live in the midlands (in England). I didn't hear this bang myself, but it has been heard in a number of different counties apparently including where I live. Some people have said that it is a sonic boom. I'm not sure myself as I haven't heard it.

I first heard of this on facebook, as many of my friends have posted about it! And I eventually saw this on the BBC news website (which I don't take very seriously - but link posted at the bottom). But still, it's interesting.

So what are your opinions? Do you think it is simply some sort of sonic boom or something more sinister?

www.bbc.co.uk...

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www.abovetopsecret.com...

Oh my! I'm so sorry for the double post! I always get irritated by these but just did it myself, d'oh! Thanks for the re-link matey!