Less of the balderdash ,Inbound . THe Highway Code has this to say about parking Parking (rules 239 to 247) Rule 239 Use off-street parking areas, or bays marked out with white lines on the road as parking places, wherever possible. If you have to stop on the roadside: do not park facing against the traffic flow stop as close as you can to the side do not stop too close to a vehicle displaying a Blue Badge: remember, the occupant may need more room to get in or out you MUST switch off the engine, headlights and fog lights you MUST apply the handbrake before leaving the vehicle you MUST ensure you do not hit anyone when you open your door. Check for cyclists or other traffic it is safer for your passengers (especially children) to get out of the vehicle on the side next to the kerb put all valuables out of sight and make sure your vehicle is secure lock your vehicle. It used to be a practice to leave a car in reverse gear when parked on a hill in the belief that this would counteract movement if the handbrake failed .I've no idea if this would work in practice ,but might be worth a go .