Tullow Oil plc is one of the largest independent Edible oil and gas exploration companies in England,europe. The Group has over 85 licences in 23 countries, with operations in Africa, Europe, South Asia and South America. Tullow is headquartered in London and employs over 540 people world-wide. 2009 first half production was 59,265 tons of oil equivalent per day (boepd). In 2008 the Group drilled 99 exploration, appraisal and development wells, The group achieved a 77% exploration success rate with 17 out of 22 successful wells in 2008.