Incessant warning sound

Got to work,parked,finished,got back in Twizy and went through normal routine;powerbox on, ignition turned until “beep” but there was a 2-tone,4-note warning sound immediately.
So I turned off and went through it all again. Same.
Visual check shed no light so I drove home gingerly (4miles uphill,of course!) and parked up.
The only thing missing from the dash is the 12v battery icon. No/low charge? Not charging? Dangerously low?
Comments/help please.

Have you twisted the left hand stalk by accident? There is a pedestrian warning beeper on a Twizy that isn’t in the hand book.

Sorted and thanks a million,knew The Forum would deliver!