“We’re aware that some NOW TV Boost customers with a Sky Sports Pass are experiencing issues with streaming quality on YouView boxes. To make sure all customers can continue to enjoy the latest sporting action, we’ve reduced the streaming rate from 50 to 25 frames per second on all Sky Sports channels for now. We’re sorry about this issue, and we’re working hard to get it fixed as soon as we can. You can continue to enjoy other NOW TV Boost features on your YouView box, including full HD, surround sound and streaming on 3 devices at the same time”
Indeed. It's still 50FPS if watching through the EPG though. I had a look at the NowTV app just for the sake of 'nostalgia' - at 25FPS it looks a complete mess. Can't quite believe I used to put up with that.