If Keir Starmer leads Labour into the next general election*, a seventeen year old will not be able to use YouTube to watch party political broadcasts and their screen would cut out half an hour into the debates, but they can vote in the election afterwards.
*He won't but bear with me
Stephen Bush
It is the official stance of the UK government that you're mature enough at 16 to vote in general elections, but not mature enough to go on YouTube after dark.
James Ball
Your regular reminder that votes at 16 has almost passed the House of Commons. (Is at report stage and then will go through the House of Lords)