British MoD Acquires Solar-Powered Zephyr UAV

Solar Drones Are Filling the Skies, But There's Still No Clear Winner

Airbus' solar-powered aircraft Zephyr completes two 18-day flights

PDF) Analysis of Several Research Problems in Near Space Vehicles

Zephyr Ultra-Long Endurance UAVs - Defense Industry Daily

An overview of Britain's drones and drone development projects

Airbus Defence and Space Launches High Altitude Pseudo-Satellite

Artist impression of the Zephyr, a light weight HALE UAV

Zephyr breaks own record for longest unmanned flight

High-Altitude Platforms — Present Situation and Technology Trends

List of active United Kingdom military aircraft - Wikiwand