The Phillips Optimised Cascade LNG Process is outlined. The inlet feed gas is first prepared by acid gas removal, dehydration and mercury removal and a first stage of propane refrigerant chilling. The treated gas then goes through further stages of chilling and is finally cooled and condensed in ethylene refrigerant chillers. Condensed gas from the chillers then enters a closed loop refrigeration cycle which produces liquefied natural gas which is sent to the storage tanks and a recycle gas stream which is sent back to the last stage of propane cooling. Recent efforts to improve the process in terms of balancing efficiency and capital cost are described. These include pinch analysis and case studies using process simulation. Phillips have also been involved in engineering studies including Front-End Engineering Design (FEED) packages for three generic plants which will incorporate the latest optimisation techniques and compression and liquefaction technology. (UK)