Unmanned vehicles: A (rebooted) history, background and current state of the art

This introductory overview is an update to the original pr cis paper in JLIS vol 19(1) by Gogarty and Hagger. It provides a contemporary summary of unmanned technology in use at the time of publication. Legal analysis and commentary from the original pr cis has been removed. Comments and responses by authors in this edition should be taken to refer to the original pr cis paper.