Union Jack holds 27.5% interest in licences PEDL180 and PEDL182, while operator Egdon Resources Plc (LON:EDR) and Europa Oil & Gas Holdings PLC (LON:EOG) hold 30% each and Humber Oil & Gas Limited 12.5%.
The planning inspectorate, in charge of the appeal, also allowed the application for an award of costs against North Lincolnshire Council.
The saga began last year when Egdon Resources lodged an appeal against the refusal of planning permission for the drill site from the local council.
Union Jack Oil’s executive chairman David Bramhill said the board was “delighted” with the news.
“The operator will, on behalf of the joint venture partners, begin work on discharging the planning conditions and detailed planning for development of the Wressle Oil Field,” he said in a release.
Shares jumped 9% to 0.18p on Friday afternoon with Egdon 8% higher and Europa up 7%.