If BT/YouView insist on obscuring a large part of the screen with opaque dirty blue or black whenever Play or Pause or Fast Forward are pressed so hiding much of the picture and any running subtitles they should learn a lesson from On Demand programming:- If I'm watching something on iPlayer etc. and press Play or Pause etc. a progress bar does appear at the bottom of the screen. However iPlayer then very helpfully moves any subtitles up to the middle of the screen so that they can still be followed. Watch, BT/YouView and learn!