"Apart from the pure duty / tax issue, what sticks in my craw is that your supplier is supposed to monitor your usage of the stuff. If you have a domestic installation for heating the delivery driver is supposed to monitor your tank to see if it is fitted with a draw off hose, the oil distributor monitors your usage and reports to C&E if your usage fluctuates wildly."
I don't think anyone monitors our heating oil. We don't necessarily buy from the same supplier each time, or at regular intervals. This is 28sec kerosene, normal UK heating oil. Not the same as Diesel.
Tony S Thought I'd posted this earlier, but it's disappeared.