Andy Inglis, Kosmos chief executive, said “we have both committed to a work programme in 2017 that should allow a final investment decision by 2018 and first gas by 2021”.

Front-end engineering and design is due to start this year on what is planned as a low-cost, scalable project.

After the first FLNG vessel, with capacity of about 2.3 million tonnes per annum, comes online, a second of the same size and design is due to start-up in 2023.