i was told by a judge that if the keys are not accessible to you then you are o.k e.g you can not get them back if you tried e.g a friend takes them home with them. this example was based on the vehicle being in a pub carpark
Hmmmm, drunk sleeping in car with no access to keys.....can still release the handbrake and be in control (or out of control) of that vehicle, so having the required tools at his (or her) disposal to cause damage to person or property. IMHO