For most programmes that are pre-recorded, we create the subtitles in advance. A technician uses the audio and picture to sync them up with what鈥檚 happening on screen.聽
For a programme that鈥檚 broadcast live (like the news or Strictly Come Dancing) or close to live (like Have I Got News for You or The Graham Norton Show), subtitles will be generated as it's being broadcast. This means you鈥檒l often notice a delay when watching these programmes, be it live or on demand. We can sometimes replace live subtitles a short time after the broadcast, although this isn't always available.
If you spot a programme with out-of-sync subtitles, check our known issues page聽to see if we already know about it. If not, please get in touch and we鈥檒l check.