[Brekkie]

wouldn't exactly release much capacity though, and it provides another avenue to fill in FM/DAB not-spots (isn't that why BBC local radio was put on Freeview?)

They can't use that justification for radio on a TV platform though when they're justifying moving TV channels online.   And as we see in Scotland removing the radio channels can free up space for two TV channels on PSB1. 

Personally I'd rather they were left but if it came down to a choice it's an obvious move to make.