Before joining Arena in June 2013, Hui was the executive planning director at G2 Joshua, which is now part of Geometry Global. He was the executive planning director at Nitro between 2008 and 2009.
Hui was the head of planning at Saatchi & Saatchi from 2005 to 2007, and spent a year at Coca-Cola as the director of advertising for Europe, Eurasia and the Middle East.
His funeral was held at Golders Green Crematorium last Friday.
Hui is survived by his parents, Polly and Robin Ray.
For those who would like to make a donation in his name, Hui was a supporter of both Shelter and the Sevashram Sangha temple and community in London, W12.