[Robert Williams]

Yes. I do have vague memories of the switching interval being increased, I’m not sure it was ever 15 minutes but I may be wrong.

I did have a brief look on Genome to see if there were any updates to the CBBC schedule around the time BBC Four launched and couldn't see anything. Surely it would have a knock on effect with the schedules of the channels?

I think it was still BBC Knowledge at the time that the children's channels temporarily changed to a 6.50pm closedown.

Radio Times didn't carry listings for CBBC and CBeebies until October 2002, so unfortunately there is no record of the channels' schedules in Genome for this period - even if had they done so, I doubt their listings would have been up-to-date enough to include the alterations to the schedule.