Let's just leave aside the observation that "man proposes to girlfriend at gig" should be more the business of the Kent Messenger than the Daily Mirror, and wonder at the 3AM Coverage of said event.
It happened at a Feeling gig - we can well imagine such a show would be so dull you'd say anything, anything at all to break the tedium - and the 3Amies record it thus:
So far, so cute - although we can't help wondering if the words "if we make it out of this gig..." were involved. But then:
A source? Do you suppose they've just set up a Word Macro which strips out any attribution at all from their copy? Could they not have at least pretended the person from the Feeling's record company who probably rang this story through to them was "a person at the gig" or something at the very least? Or was there a long, involved discussion - off-the-record, on third-party territory - as to how they would work this quote into the story? A Deep Throat insisting "you can tell your readers there wasn't a dry eye in the house, but please, in God's name, make sure they don't trace it back to me..."?
Still, congratulations to the soon-to-be Mr and Mrs Gall. You might want someone else to pick your first dance tune, though.