CBBC HD and CBeebies HD will have reduced capacity during the Olympic period to make room for BBC Four HD’s extended coverage of the Olympics. BBC Four HD will start broadcasting at 1:00pm during the Olympics, and be available to more viewers.
Some viewers may lose CBBC HD until the 23rd of August when normal service will resume. If you are among the viewers who will continue to receive CBBC HD over the Olympics it will move to channel number 97 on Freeview.
For unavoidable technical reasons, any series links you may have in place on the three above channels will be lost. Viewers should reset recordings to the standard definition versions of the channels so no programmes are missed.
https://www.freeview.co.uk/service-updates/update-to-get-new-red-button-services-for-olympics-coverage.html
Due to this temporary move CBeebies HD will have slightly less coverage in the UK than previously. This will result in a small number of viewers losing CBeebies HD. However, the SD version of CBeebies is still available to all. We apologise for any inconvenience this causes.
http://www.bbc.co.uk/reception/news/item107