Intersting reaction from different people! I am sure, in fact I know that HMRC is well aware of the likely misuse of diesel, but is potentially being put in a postion by our government of having unenforceable tax laws. Personally I think that if the duty was increased to the minimum EU level then most boaters would not bother, but faced with diesel prices more than doubling, nobody can blame people for avoiding an unreasonable and unjust tax increase. I am certainly not suggesting that anyone on this forum should or would avoid paying the extra duty, and I do not personally work for HMRC!