Apparently commercial hire boats will still be able to use the 'lo tax' pink diesel. But non commercial boaters will be obliged to use the 'hi tax' diesel. We will not be able to fill up at commercial boat yards unless they install 'lo' and 'hi' tax diesel. We will have to find private marinas which soon will be forced to convert their supply to 'hi' tax diesel.
The EU law specifies a minimum rate of duty but our government chooses to add more than the minimum which is why the fuel in this country is more expensive. If the government applies the minimum duty to diesel for non commercial boaters then this will encourage it's use. It will also limit the possible purchase for boats of the 'hi tax' fuel at road side pumps.