Except that's not what happened. It's just the way it looked in the edit. But because that's the way it was presented all the papers ran with the story when in actual fact the footage that appeared to show ER leaving was actually footage of her arriving. So now the BBC are on the back foot, apologies are flying around and resignations are being called for.
What strikes me as odd about this is that these kind of editing techniques are clearly used all the time in telly-land. It's only because it's embarrassed the Queen that they've had to apologise. I bet she didn't have to sign the usual release form waiving all her rights before they started filming. (She doesn't wave or waive like anyone else, that one.)
If you watch a Wife Swap/Holiday Swap/Shipwrecked/whatever, I'm sure you'll see the same kind of editing all the time. Rows are ramped up and conversations manipulated in edit suites every day.
When there's only one camera crew in a room they have to use shots out of sync because they can't film what one person says and the other person's reaction at the same time. So at the end of a long day when they catch someone looking bored and yawning, they'll take that and cheerfully splice it into a conversation from earlier in the day to make it look like the two people weren't getting on. You see reality TV participants complaining about it after the event all the time... but nobody asks anyone to resign over it. We all just think they're complaining about nothing, that they should have known what they were getting into and that it doesn't really matter because it's only telly.
A friend once told me about the contract they were asked to sign for a reality TV show. One of the clauses was that the company had the right to misrepresent the participant. Reality. Misrepresent.
In a joint statement from the BBC and RDF they said, "This assembly was never intended to be seen by the public or the press," which does make you wonder who it was meant to be seen by. Were they making it for their own amusement? For a bit of a laugh? What seems most likely to me is that the piece was put together by someone who just went about their job the way they normally do... using the footage available to them to make the most entertaining story they could. It's just that nobody stopped to think, that maybe, just maybe, they shouldn't do that to the Queen.
I bet it won't stop them doing it to anyone else though.
Here's the Queen storming out of a photoshoot with me some time last year: