Trader Media Group, the AutoTrader publisher of which Guardian Media Group sold a 49 percent stake last year, has appointed former Sky online products and services director Dominic Collins to be its group new media director. He joined last month, the company’s website reveals. Reporting to CEO John King, Collins’ CV includes stints as commercial director at mobile firm Buongirono and ad director at NatMags. Trader Media is going great guns as a multiplatform car ads brand, reaching 10,319,057 monthly uniques in March.