[robertclark125]

It's easy to forget, until spring 1989, there wasn't an interval before ITV Schools on 4. Instead, it was in vision teletext and ETP-1, then a minute of black before the opening junction of ITV Schools on 4. Once the Channel Four Daily began, they had to insert an interval. I suppose one reason for the interval was, when schools were on ITV, there had always been an interval, and so teachers, and "viewers" were just used to it.