Four million cameras monitor the British

The four million cameras located on the streets and highways have made it possible to retrace almost all the movements of the suspects as happened with the failed attacks in London and Glasgow, or with the attacks of July 7, 2005 in the capital of England and the United Kingdom, in which cameras in the subway helped to identify the four extremists.  

The installation of these cameras began in the 90s with an investment of 78% of the budget of the Ministry of the Interior, but between 1994 and 2004 the budget was raised to about 500 million pounds, that is, about 740 million euros.
(Source: La Nación)