The document describes a competition run by the UK Ministry of Defence's Defence Science and Technology Laboratory (Dstl) to develop swarming drone technologies. It outlines three technology challenges: 1) developing open modular drone platforms, 2) enabling single operators to manage swarms of 20+ drones, and 3) developing enabling technologies like payloads and sensors. It provides examples of how swarms could support military operations. The competition will fund Phase 1 proof-of-concept projects up to £1 million total. Successful projects will demonstrate their technologies in July 2017 and have the opportunity to bid for Phase 2 funding of up to £2 million.