[Lord Snooty]

Yes. I think we're all pretty much used to the idea of having adverts interrupting our programmes. Every programme made for the BBC is made by an independent production company and they're all made with convenient spaces to put an ad break in.
And in between each programme, they always spend the length of what could be an ad break, advertising their own stuff.

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As for the crown jewels, I think that went ages ago.