If you're hoping for a DJI drone this Christmas, be prepared for one teeny-tiny roadblock as you rush into the back garden with controller in hand. Today, the company has announced a mandatory "Knowledge Quiz" for all of its customers in the UK. It will live in the DJI GO 4 app — which is basically required to use the company's snap-on controller — and pose eight questions about safe, common sense flying. In short, you won't be able to fly until you've answered them all successfully. So if you haven't already, it's worth swatting up on our handy guide to UK drone regulations.