If you have a good alarm it won't disable the alarm.So would I be right in saying that if I have deadlocks fitted (eg Locks4Vans T Series) then a screwdriver attack would act like a key - unlocking the doors and disabling the alarm) but would have no effect on the deadlocks?
Cheap alarms do link to the door sensors/locking mechanishm, Thatcham proper alarms should not to get the certification.
Ie, the alarm should sound if unlocked and doors opened without first disabling the alarm.