The last decade experienced a new Mass Surveillance in Europe and the United Kingdom. Facial Recognition Technology in several EU member states including Britain, deeply overblown normal lives of citizens. All spying plans failed to get incontrovertible results. Over the past 20 years, growing national security controversies mostly revolved around the failure of intelligence cooperation among the EU member states, which resulted in mistrust and emergence of major extremist organizations that threatened national security of the region. The United Kingdom left European Union on 31 January 2020, but faced more trouble to deal with the member states hostile policy. In yesteryears, some intelligence reforms were introduced in France, Germany, Britain, Poland and Romania, but bogged-down and embroiled in a complex struggle to confront former Communist intelligence infrastructures and bring intelligence under democratic control. The introduction of Mass Surveillance programs of British and European intelligence services prompted anxiety and fear of warrantless information collection. The backbone of the British intelligence surveillance is TEMPORA that watches everyone with its changing sights, and collects every piece of intelligence information with care. This surveillance system has many eyes and ears that lesson to every social and political conversation across the country. This important book discusses national security and intelligence surveillance mechanism in Britain and the European Union Member states. The Book also spotlights elements of centralization of power in Britain and the EU.