Shale exploration companies IGas Energy and Dart Energy have signalled that their merger is likely to go ahead after IGas finalized due diligence work.

IGas and Dart announced their intention to combine early May, with IGas valuing Dart at about $187 million. At the time, the companies said the merger would create a major U.K. onshore oil and gas company with more than 1 million licensed acres including major shale basins.

In an joint London Stock Exchange statement updating progress on the Dart acquisition, IGas says it is now satisfied with a due diligence process, and the deal is expected to proceed. Dart and IGas shareholders are due to vote on the proposed merger in August and the deal is scheduled to be completed by September.