Regarding the letter about short measures from pumps. For many years I was a service engineer covering filling stations for a number of oil companies. Part of the work was testing and recalibrating meters to within Trading Standards tolerances. Some companies and operators were regularly calling us in to reduce the measure to ‘Below Strike’, which is allowed as long as it is within the permitted tolerances. I hated doing it as it is the Filling Stations equivalent of adding water to meat products to increase their weight. It was always satisfying to attend with the inspecting officer and at his instruction raise the level. They are tested at various speeds of delivery using divergent size stamped measures, all must come within the standard. However there are pumps out there that are more generous than others and those which are lean.