Turns out he edited it using Lightworks.
There's an interview with Tariq at the Lightworks website where he talks about how he got his start, editing, and Lightworks.
The most enjoyable thing for me is in the shaping of a film after the assembly stage. It’s amazing how malleable it is during the editing process, and then to make the material work in a way that wasn’t intended - either by luck or by judgment - is very exciting.Lightworksbeta: In the spotlight: Tariq Anwar
Also I love editing with a full FX track and temp music. Finding the right score and the appropriate place to use it is a great part of the picture cutting process.