When it comes to fringe players in the smartphone OS sector, we’ve seen Firefox OS, FireOS, and Cyanogen (which will soon be accompanied by OxygenOS). Another player is entering the fray next week courtesy of Spanish hardware manufacturer BQ. BQ has repurposed one of its existing Android handsets to give us the Aquaris E4.5 Ubuntu Edition, which will launch across Europe next week for ???169.90 (roughly $190).