Opening major new fields in the North Sea would make almost no difference to the UK’s reliance on gas imports, research has shown.

The Jackdaw field, one of the largest unexploited gasfields in the North Sea, would displace only 2% of the UK’s current imports of gas, which would leave the UK still almost entirely dependent on supplies from Norway and a few other sources.

The Rosebank field, also in Scottish waters but mainly containing oil, would displace only about 1% of the UK’s gas imports.

Tessa Khan, executive director of Uplift, the campaign group, which compiled the data from public sources, said: “New fields like Jackdaw and Rosebank would do vanishingly little to boost UK gas production. Even in the most optimistic scenario, and assuming none of its gas is exported, Jackdaw would provide just 2% of UK demand over its nine- to 12-year lifetime.”

It has already been shown, by authorities including the UK Energy Research Centre, that new drilling would not reduce oil and gas prices, or improve the UK’s energy security. It is also unlikely to produce durable jobs or major new tax revenues, as 90% of the UK’s North Sea oil and gas has already been burned, putting the industry in steep and irrecoverable decline. Companies are also demanding tax breaks to tap the new fields, which are harder to access than existing supplies.