After London the South East has the highest population density in the UK and is often referred to as the engine of the British economy. The region has the most varied economy of all UK regions. It is home to many international engineering and technology companies, particularly in the defence and aero industries. The region also has a flourishing space industry. Other well-developed sectors are IT, the pharmaceutical industry, BioTech and agriculture (mainly fruit). The Brighton area is a hotspot for the creative sector, including a concentration of interactive media.