On the "it's greener to use North Sea gas", Channel 4 have done a fact check:
On the day he announced hundreds of new North Sea oil and gas licenses prime minister Rishi Sunak told reporters that producing natural gas in the UK is “better for the climate” than importing it from abroad. He said that’s because it’s “far better to have it here at home…
www.channel4.com
FactCheck verdict
Rishi Sunak claimed that extracting more gas from the North Sea is “better for the climate” because the alternative — importing gas from abroad — is “four times” more polluting.
It’s true that the extraction, processing and transport of imported natural gas is four times more carbon-intensive than the extraction and transport of gas taken from the North Sea.
But when we account for the massive carbon emissions caused by burning the gas, the difference between the two sources becomes proportionally much smaller. Using figures from the International Energy Agency, we estimate that imported gas is about 17 per cent more polluting overall than North Sea gas — not “four times”, or 500 per cent worse, as Rishi Sunak claimed.
And of course, the more gas the world extracts — wherever it’s from — the more carbon will be emitted into the atmosphere
Arguably, to make the same carbon saving as increasing our North Sea gas use, we could instead cut our use of imported gas by 17% by increasing the use of green energy.
Given that any new licences are likely to be several years (if not more then a couple of decades) away from actually delivering any extra gas, whilst new renewables can be delivered much faster.
How could we cut our gas usage by 17% you may well as. Given that LPG actually only makes up 35% of our gas usage we'd actually only need to cut our total gas usage by 6%.
Whilst our usage changes year by year depending on winter temperature, the general trend is downwards (there's always outliers, such as 2014 was the lowest use year 1994 - earlier than that and coal was doing a lot of the power generation), if we repeated last year's reduction in gas use in percentage terms (so a smaller actual number of units in reduction) we'd see a 8% fall, even between 2019 and 2021 (2020 is an outlier due to COVID) there was a 1.3% reduction - so we'd only need 5 years of similar reductions to reduce LPG demand by enough to reduce our emissions by the same amount as replacing all our LPG use with North Sea gas.
Arguably by the time we've got to (say) 2038 (15 years from now), it we manage to reduce gas use by 2.8% year on year there would be no need for that 35% of gas which is imported as LPG. Therefore, likely to be pointless to have created those new exploration licences.
That's still not going to be easy, and it's likely that old sources will shut down over time, so it's unlikely the LPG imports will stop (especially given that some allow gas experts to Europe), however with most new houses being built from this summer having air source heat pumps rather than gas boilers, the use of gas is likely to only tend downwards.