[Stuart]

The transponders are being emptied to make way for the next batch of regional HD channels each time a group switch.

The only SD channel to remain at the end of the process will be Nightlight.

There's more than one channel staying in SD. The nightlight transponder will have one version of every BBC channel in SD, plus all the radios.

I was referring specifically to there only being a single BBC One SD channel at the end of the process. Of course, BBCs Two/Three/Four etc will have similar nightlight channels.