Google use and is used for many things include this one:

One of the plotters behind the alleged scheme to explode gas pipelines at John F. Kennedy airport directed his co-conspirators to use Google Earth to obtain detailed aerial photos of the targeted facility. In a federal criminal complaint, an excerpt from which you'll find below, one of the accused, Abdul Kadir, reportedly told cohorts to use the popular satellite software after he determined that surveillance video shot by the men was "not sufficiently detailed for operational purposes." Kadir, a Guyanese citizen and former member of that country's parliament, made the Google suggestion during a February meeting with an alleged co-conspirator and a government informant (Kadir and three other men have been charged with planning the terror attack).

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Probably why the whole of central London has been blurred out for a long time.