Defence Drone

A new race of Daleks who passed themselves off as Defence Drones (WC: The Defence Drones) or security drones, and were collectively dubbed the New Dalek Army by their creator, were cloned from its own template by the Reconnaissance Dalek following its own imperfect resurrection by Leo Rugazzi. They shared their model's ability to teleport using ultraviolet light, but also the human-derived flaws and mutations that Rugazzi had added to their genome when recreating the Reconnaissance Dalek. (TV: Revolution of the Daleks)

Characteristics
They were all black Daleks regardless of rank and had a unique design with claw manipulator arm. The light emitted by their eyes and highlights in their casing appeared blue when they were in drone form, but the lights turned red when they became inhabited by the Dalek mutants. (TV: Revolution of the Daleks)

Creation
Leo Rugazzi built the first drone himself in the United Kingdom, after which Jack Robertson bought his company. The drones used Artificial Intelligence to predict the best choice to make from many different scenarios.

During a fake riot organised by Robertson to show MP Jo Patterson his drones, a drone shot a high speed jet of water and fake tear gas from its two arms. It later emitted an high frequency sonic wave, causing the rioters to flee in irritation. Jack, Jo, and Leo had to wear earphones to protect themselves from the screech.

Jack 3D printed thousands of drones over the course of a year, which were rolled out across the nation at borders and national landmarks. Although the drones were not intended to be able to kill, the Reconnaissance Scout, controlling Leo, made him change the plans so that the new casings could fly, kill, and house a Kaled mutant. (TV: Revolution of the Daleks)

Invasion of Earth
According to one account, some time before 1 January 2021, one Defence Drone Dalek prematurely made a broadcast to humanity, claiming that the Daleks had taken control of Earth and that this day of victory would henceforth be celebrated as Dalek Day. However, after an unidentified incarnation of the Doctor interfered with the broadcast, the Dalek relented, though claiming that its kind would return on New Year's Day. (AUDIO: Incoming Transmission)

In 2021, a few hours after Patterson won a general election, she had Robertson distrbute the Drones around the country. After the Drones were brought online, Dalek mutants transported themselves into the casings using ultra violet light and began exterminating nearby humans, officially launching their revolution. However, the Thirteenth Doctor then attracted the Dalek Death Squad to Earth, knowing their first priority would be to exterminate impure Daleks and that the Defence Drones' cloning process had left them with slightly mutated DNA.

When making contact with the Death Squad Daleks, the Defence Drones insisted that they were Daleks while the Death Squad Daleks deemed them impure. The Death Squad Daleks thus began attackng the Defence Drones. By the time the original Reconnaissance Dalek transmatted into the Death Squad's ship, the Death Squad claimed that they had succeeded in destroying all of the cloned Dalek. The Reconnaissance Dalek begged to be left alive even if its race was purged, as it had originally been a pure Dalek before its death and resurrection, and believed it deserved to have its genetic material purified rather than destroyed. However, the Death Squad denied it this chance and destroyed it.

The Death Squad Daleks and their ship were subsequently destroyed by Team TARDIS and Jack Harkness by being tricked into a "spare TARDIS" whom the Doctor then set to materialise into the heart of the Void, a counterfactual instruction which led the TARDIS to crumple on itself with the Daleks inside. (TV: Revolution of the Daleks)