The Admiralty Underwater Weapons Establishment, built as a Gunnery Establishment at the beginning of the Cold War, was closed in 1995 alongside Portland's naval base. The establishment buildings remained empty for two years, until Roy Haywood and Ray Bulpit, whose business was the acquisition and development of former military sites, purchased the site in 1997. The first tenants of Southwell Business Park arrived that year, and the park continued to expand its range of business tenants. In the 2000s, the site was recorded as employing almost 500 people and being home to over 100 businesses. It was estimated that the total turnover generated at the park from 1997 to 2008 reached over £200 million. In 2006, work commenced on developing unused parts of the park, including an unused 1970s-built wing, into the Portland Spa and an 80-bedroom hotel, known as the Venue Hotel. Completed in 2007, the spa included a gym, a fitness studio and an indoor swimming pool. The Orchid Restaurant was also converted from the former AUWE canteen. It was later renamed to the Cliff Panoramic Restaurant and Bar. In 2010, the park went into administration after the UK recession made it difficult to repay borrowed money used to create the spa and hotel. The site was sold to Compass Point Estates. After a succession of ownership changes and names, the tenants of the Ocean Spa took over the hotel and restaurant in 2013. In 2016, the Isle of Portland Aldridge Community Academy's new £14 million campus was opened within the park. The Ocean Spa and Hotel had closed in 2014 due to the new school premises, however by 2015 the hotel had reopened with new management, and was named Ocean Hotel and Bar. The hotel is currently known as the Maritime Hotel. In 2017, business and enterprise director Calvin Samways acquired a stretch of real estate at Southwell Business Park from the Compass Point Estates for a six figure sum. The unused site was then redeveloped into seven industrial units, named the Network Enterprise Complex. It was officially opened in 2018 by South Dorset MP Richard Drax and Weymouth and Portland's Mayor and Mayoress.
