https://www.techradar.com/news/4k-hdr-world-cup-matches-coming-to-bbc-iplayer-but-theres-a-catch

Good news! You'll be able to watch the World Cup in 4K HDR thanks to the BBC and its iPlayer platform. Bad news! It's a limited trial run, meaning that it'll be serving up the Ultra HD football streams to a select number of viewers.

All 29 of the matches the BBC is broadcasting will be available in 4K, with the broadcaster hoping to deliver “tens of thousands” of high-resolution streams. Though 4K screens in homes aren’t quite as common as HD ones, there may still be some viewers left without access to the UHD content.