John Cooper, the song at the beginning is called Catch A Smile by Kenny Garned and the one after that is called Why Not Love? I hope this answers your question.
according to what was put down on TV Forum, this was due to sound problems with ReviseWise Science during BBC Learning Zone which ended up being cancelled to be replaced by school history programmes.
at 6:43, why did sarah gentry say in her continuity announcement "this is bbc two, and i'm sorry to say that we can't continue with this listed programme, instead, here's something else."?