During the first Nestene invasion of Earth in the late 20th century, Auton dummies were reported to be attacking communication centres all over Britain. (TV: Spearhead from Space)
In 2019, a lone Dalek attacked the Government Communications Headquarters (GCHQ) in an attempt to call a Dalek fleet to Earth for invasion. It shut down all power in the UK in the process. The Dalek was thwarted by the Thirteenth Doctor and her friends. (TV: Resolution)