The NSTA published analysis in July 2023, comparing the carbon intensity of United Kingdom Continental Shelf (UKCS) gas with imported liquefied natural gas (LNG).
The analysis shows that domestically produced gas is on average almost four times cleaner than importing gas in LNG form. This is because of both the way the gas is transferred and, in some cases, the methods of extraction.
In particular the analysis shows that gas extracted from the UKCS has an average emission intensity of 21 kgCO2/boe; whereas imported LNG has a significantly higher average intensity of 79 kgCO2/boe.
The process of liquefaction, combined with the emissions produced by the transportation and regasification of the LNG once in the UK, are responsible for the considerably higher emissions intensity.
The UK imported 63% of natural gas supply in 2022.
The results of the analysis are shown in the fact sheet below and can also be viewed here.