Wentworth Resources has opted to relinquish the onshore Tembo Block in the Rovuma Basin where it had been seeking a partner to appraise the 2014 Tembo-1 gas discovery. The company said in October that a re-evaluation of the Tembo discovery had indicated that it was unlikely to be commercial. Insecurity in the region forced the company to suspend activities earlier this year and in June the National Petroleum Institute granted a one-year extension to its appraisal licence.