Switching from TV to Radio

[Hebridean]

So pressing the TV/RADIO button doesn’t flick between the TV Channels & Radio Channels?

I presume you are doing this while watching TV. Doing this as in pressing the TV/RADIO button while viewing BBC 1 HD for instance?

Yes, if I press the TV/RADIO button the screen shows the TV channels on the left in groups format. If I scroll to the bottom of the list there is an entry Last Scanned - if I open that up and scroll down that list, the radio stations are shown and I can select one and it opens up in the PIP window on the right and plays the radio station.

If I then use the Exit button, it then returns to the previous TV show that I was watching.

QUESTION: What does your STB do when you use the TV/RADIO button, select a radio station and play the station, then use the Exit button?