Firstly, there's nothing in the instructions about DST changes for this unit.

It does mention that if the "Set Date & Time" is set to auto (by default) the clock synchronizes with the DAB data being sent.  It would appear that only works if the DAB radio is actually on.

If you are asleep at 1AM with the DAB radio off when the clock change occurs, the time is not updated.

Not a great feature.

My very old Sony clock radio had a manual DST button which you just pressed before going to sleep to put the clock forward/back.

Seems a retrograde step on what appears to be a Hi-Tech unit.

Does anyone know if it is possible to have the DAB radio on but volume silent and have the alarm set at the same time so the clock advances/retards at DST clock change?

In this case, will the alarm still sound even though the radio volume is set at silent?