Most of the UK's gas imports from Norway could be cut off this weekend if strikes go ahead, says the company that transports gas between the countries.
A spokesperson added: "We have one of the most reliable and diverse energy systems in the world, with access to our own North Sea gas reserves, and the second largest LNG port infrastructure in Europe."
But while the potential strike action will only impact the operations at Easington, Gassco said that was by far the most significant of the two, receiving 80% to 90% of the gas from Norway.
A spokesperson for Gassco, who operates pipelines to the UK, told the BBC that "in a worst case scenario, from this Saturday there will be zero deliveries to Easington", a line first reported by the Financial times.
The first phase of the strike action began on Monday, forcing the Norwegian energy company Equinor to shut down three of its oil and gas fields. More strikes are expected on Tuesday evening, impacting three more Equinor facilities.
It's this phase of strikes that will affect UK supplies as it would temporarily close the Sleipner field - a key distribution point for gas exports to the UK.
But it said it was difficult to compensate with supplies from elsewhere in the system when a hub, like the Sleipner field, goes down.
Gassco transports gas to other European countries including Germany and Belgium. It's thought strike action could prevent up to 170 million cubic litres of gas from being delivered, around 50% of the total delivery amount from the company.