Following the completion of all the training and testing required to prepare for our stratospheric flight trials with PHASA-35 staring in 2021, the Prismatic team working at the Atlas test site in Spain completed a day long flight of the PHASE-8 HALE surrogate vehicle, smashing the previous longest flight by three hours. Carrying the complete suite of PHASA-35’s High Altitude, Long Endurance (HALE) UAV avionics, PHASE-8 has proven again to be an invaluable tool in preparing and testing for HALE operations at pace and low cost – as well as being rather a natty aircraft in its own right. Occurring close to the end of the trials this was a fantastic way to close out another outstanding flight campaign at Atlas and we send our thanks to the Atlas team for enabling such enjoyable success.