Fawley Refinery is an oil refinery located at Fawley, Hampshire, England. The refinery is owned by Esso, which acquired the site in 1925. Situated on Southampton Water, it was rebuilt and extended in 1951 and is now the largest oil refinery in the United Kingdom, and one of the most complex refineries in Europe. With a capacity of 270,000 barrels a day, Fawley provides 20 percent of UK refinery capacity. An estimated 2,300 people are employed at the site.