A report on Develop claims Edmondson will continue to work "in the industry in an undisclosed capacity".
In the five years since Reflections has become a part of the Ubisoft team of studios, we have had the pleasure of working and creating together with Gareth Edmondson as head, a Ubisoft statement said.
Gareth has made the choice to leave the studio at this time. Our team of talented developers at Reflections will continue their work on upcoming projects under the supervision of Giselle Stewart, Studio Manager, and Darren Yeomans, Production Director, until a permanent replacement has been named.
Edmondson was most recently responsible for Driver: San Francisco, which garnered a surprisingly positive critical and commercial reception.
Ubisoft Reflections was formerly known as Reflections Interactive, which was founded by Gareth's brother Martin Edmondson in 1984.