New operator Orange-Nassau Energie (ONE) is drilling ahead on the closely-watched Tanzanite offshore exploration probe in the GEms area on the Netherlands-Germany border.

A successful result could add weight to what are thought to be already substantial volumes in the nearby Ruby gas discovery.

ONE took over operatorship of the area from Hansa Hydrocarbons on 1 April after Hansa’s acquisition by private equity-backed Discover Exploration in March.