Hi there
I've the CT200h 2014 FSport facelift model and have finally worked out how to find the remaining DAB stations (other than the BBC DAB Presets)
After researching and googling, people have been talking about the DAB station being in "Groups" - on my model its called "Ensemble". This was the key to finding the stations.
When you have the BBC DAB stations on the screen push the main round knob thing to right and look for stations (not presets, cause they are the BBC DAB ones)
You're looking for the DAB station menu and either "next Ensemble" or "Prev Ensemble". Here Click and push that round knob again to the right and then view stations
Keep repeating this and it then toggles thru different regions
I live in Birmingham so when I toggled thru the "Ensembles", it showed Wolverhampton and Birmingham and South East and Gloucester and SE Wales etc etc
Its really frustating that Lexus have made it all so difficult - hope this helps
PS - Obvs if the DAB signal is poor you wont get anything
PPS - and I did find Planet Rock, Kerrang and TalkSport which made my day :-)