For quite some time, border counties have been dogged by the issue of illicit fuel being sold to unwitting customers. The practice of so-called fuel laundering has occupied Revenue officials who have conducted countless raids on operations that pose a significant threat to both the Exchequer and the environment. The laundering process typically involves the removal of a European dye from green fuels that carry a rebate, known as marked mineral oil (MMO), often used for fuelling tractors and other agricultural uses. This is usually done using a bleaching agent that can cause very significant problems for engines when used…