The British Board of Film Classification have reviewed and rated the entire 35 episodes of Transformers Headmasters and given the episodes (and subtitles) a PG (Parental Guidance) rating. There were no cuts and the total time was 767 minutes and 0 seconds. See the details in full here.
Many fans in the USA have complained that the subtitles are going to use the western names for the characters instead of Japanese ones and would have liked 2 subtitle tracks. The problem is that every dvd/video/game etc in the UK has to be rated by the BBFC and they charge money for this. Metrodome would have to spend extra on another subtitle track, which, for a small company, they cannot afford. Also, since this is a UK release, UK fans got the final vote on what they wanted.