Mr Nicholson isn't a shrinking violet, and he's had a certain amount of controversy...
His name kept cropping up in connection with the Customs 'clarification' that simple Veg Oil was not Biodiesel and didn't qualify for the reduced rate of Road Fuel Duty.
I believe his own product is Veg Oil + parrafin (or somesuch - its fossil something).
And Customs *do* accept it as Biodiesel.