An oil exploration firm has uncovered what it describes as the largest undeveloped discovery on the UK Continental Shelf.
Hurricane Energy said one billion barrels of oil could be contained within the Halifax well in the Greater Lancaster Area (GLA), 60 miles west of Shetland.
The company found oil in two wells about 19 miles apart and says the combined discoveries have proved the presence of a giant field.
It hopes to begin production in 2019.
Dr Robert Trice, Hurricane's chief executive, said: "This is a highly significant moment for Hurricane and I am delighted that the Halifax well results support the company's view that its substantial Lancaster discovery has been extended to include the Halifax licence.
"We believe that the GLA is a single hydrocarbon accumulation, making it the largest undeveloped discovery on the UK Continental Shelf.
"The discovery of a 1km (0.62-mile) column at Halifax validates the efforts the company undertook to acquire the licence and drill, test and log the Halifax well through the winter months.
"Given the positive well results, the Halifax well has been suspended to provide the company the option to return to undertake further testing as well as provide the option to deepen the well and thereby establish a definitive oil water contact.
"These are exciting times for Hurricane."
Shares rose 6% in early trading after the announcement.
Hurricane Energy has made no further developments there for budget, time and safety reasons but has the option to return.
The 2016/17 drilling campaign is now complete, with Hurricane having a 100% success rate with the drill bit.