David has appeared as a guest of UK DJ Christian O'Connell many, many times starting when Christian was at Virgin Radio. David has been involved in many stunts and sketches but two of the more obscure were the short lived segment "At Home With Mr. T" in 2006 and "One Golden Square" in 2007.
On Saturday March 24 2007, the same week as "One Golden Square" was broadcast David appeared on BBC Onewith Fearne Cottton and Reggie Yates. Virgin Radio producer Roque Segade-Vieito contacted the station for a practical joke texting in a question to Tennant as "I hear you have been signed up for a new programme called 1 Golden Square". The question was taken seriously and addressed to Tennant live on the air which pleased O'Connell greatly.