Ensuring 2020 compliance on ­sulphur content in marine fuel is a huge test of the IMO’s will to ­enforce environmental regulations and will set a precedent for what is to come in cutting carbon emissions.

Moves by some countries that suggest they might not fully ­enforce the global reduction of sulphur levels in marine fuels from 3.5% to 0.5% have alarmed many people in the industry who want to ensure a level competitive playing field.