The site we are on as a season pitch is putting metered electric in during the winter and someone has mentioned that you can buy a new plug that plugs into the electric point which then can be locked in place with a padlock so no-one else can either unplug you and use your electric or when your not there plug into your socket,Does anyone have any ideas where i can buy one from? i have found one on the net but cant find where to buy it from. Please help .