Centrica has said that UK gas storage facilities were currently about half-full.
It said: “Plunging temperatures and high demand for gas-fired power stations have reduced UK winter gas storage to concerningly low levels”.
Parts of the UK are experiencing freezing conditions, with extremely low night-time temperatures forecast in some areas.
National Gas, which owns and operates nearly 5,000 miles of the UK’s gas transmission system, said the “overall picture across Great Britain’s eight main gas storage sites remains healthy with average levels at just over 60% across the board”.
It added it is “well-placed to respond to demand this winter”.
Craig Lowrey, principal consultant at Cornwall Insight, said that there are various gas pipelines running from Europe to the UK, and the country also gets shipments of liquified natural gas (LNG).
Given household energy prices are currently capped until the end of March, any shortage would be very unlikely to affect consumer bills, he said.
If there was a short-term spike in wholesale prices, this could affect some business customers, he said.
However, the weather in the UK is forecast to become milder from next Tuesday meaning a spike may not happen, he added.
Wholesale prices are currently lower than the beginning of the year.
Jack Sharples, senior research fellow at the Oxford Institute for Energy Studies. said: “There does not appear to be a risk of a physical shortage in UK gas supply this winter.”
As well as LNG, Dr Sharples also said the UK still gets some gas from North Sea fields and there are pipelines running to the UK from Norway, the Netherlands and Belgium.
The government said it was “confident the UK has enough natural gas supplies to make it through the winter”.
Gas inventory levels have come under pressure from the cold weather conditions and the end of Russian gas pipeline supplies through Ukraine at the end of last month.
Britain has relatively little capacity to store gas, but is has more than it did compared with a few years ago.
About half of the capacity it has is at Centrica’s Rough facility off the coast of East Yorkshire.
This was closed in 2017, but then partly reopened in October 2022 following the energy crisis triggered by Russia’s invasion of Ukraine.
There is also liquid natural gas storage at three terminals, and other smaller facilities across the country.
If the UK needed more gas, traders would have access to EU stocks, provided they paid the right price.
Centrica wants to invest £2bn in the Rough facility, so it can use it to store more gas, then hydrogen as the UK starts to burn less natural gas to meet green targets.
It has been pushing the government to say hydrogen will be part of the UK energy mix in the future to justify that investment.
