TBN UK has moved to PSB3 today.
According to RXTVlog the old version will remain in place until "early 2020" on 794.
https://www.rxtvlog.com/p/freeview-updates.html
So this means whatever channel gets their old slot on COM5 won't have it over the holidays.
However, the old version of E4+1 (ch 793) has been removed today, also from COM5, so one channel might be able to take that space in time for the holidays.
---------- Post added at 15:16 ---------- Previous post was at 15:14 ----------
Oh and I forgot. There's an new streaming channel for kids, aimed at the same demographic as CBBC I think, on 212 called Yaaas!