what am I going to do with 100 litres of red in my tank, I dont use a lot of diesel, but keep the tank full to avoid corrosion. Can I use the red and top it up with red that I have paid the duty on, 0r do I have to try and drain all the red refill with red that the duty has been paid on. It could well be that I have red in the tank for 4 years. I would like to think that you could use the diesel bought legally before this stupid law came out, and gradually top it up. and as derv is low sulphur, its probably better to run the engine on road fuel anyway, If I were to re engine now it will be a lot cheaper to re engine with petrol as petrol is cheaper than diesel, or use lng which is cheaper still. this may make boating more dangerous, unless proper precautions are taken. Is the government going to subsidise people who convert to gas, and how much will the subsidy be. Bring back maggie I say she would have stopped all this bull. just tax the liver out of people who have saved up and bought an old boat, and run it on a shoestring and a prayer. while they drive round for free in goverment limos, which we pay for.