Centrica’s discreet reference to the possible choice of compressed natural gas for its Trinidad & Tobago reserves is the closest CNG developers have yet come to a project sanction.

It is a knock-back for LNG, which was the other option considered for exporting the gas, and presents a challenge to those looking at small-scale liquefaction as a way to get their reserves to market.

CNG technology has been years in the making and promoters of the quite widely differing solutions on offer have had a long wait to see a project get this close to coming to market.

Some companies have come and gone in the past 10 years as would-be backers ran the numbers on the CNG option but ultimately shied away...