Rapid beeps/bongs on ignition

[Jpbroad1970]

There is no parking sensor button.  The noise also starts again when the vehicle is put in reverse, and will continue until the car moves.

if it is parking sensors and there is no button on the dash they could be aftermarket and they are playing up, I would look for a module in the boot especially as it happens when in reverse take some photos in there normally n/s behind trim