I happened to have to sit for an hour in my new Fiesta today with the engine off. (While my dog had its hair cut as it happened.)

Previously when I have done this in my 2013 Fiesta I'm sure there was a position in the ignition key barrel that was labelled 'Auxiliary' and which was a sort of 'half-on and half-off' position. This enabled some things to be powered up when the engine was switched off, like the electric windows and the radio.

My new Fiesta has the 'Engine Start' button instead of an ignition key barrel of course, and I am at a loss as to what the equivalent to that Auxiliary key position is. The problem manifested itself today when the radio kept switching itself off every few minutes, which was annoying. Can anyone point me in the right direction, please?

Press the start button without pressing the clutch pedal.

Sent from my SM-G965F (S9+)

Yes, I did try doing that. It resulted in the green light on the button flashing, which is fair enough, but it also brought on all the usual warning lights to show the ignition was on. I don't like sitting for prolonged periods with the ignition on.

Unfortunately that's as good as it gets.
You can power the radio up with ignition off but afaik it only stays on for about 20 minutes needing you to power it up again.
I think you can change the timeout period with forscan.

Sent from my SM-G965F (S9+)

Ah. Thanks for that. I was hoping that there was something obvious that I'd missed in the manual, but apparently not.

From my experience yesterday 20 minutes is an exaggeration... It seemed to be going off every 10 minutes or so.