Trigger will become part of Isobar, the Aegis global digital network. Sarah Fay, the Isobar president, said: "It's all part of our strategy to carry out truly global campaigns." She said she expected Isobar clients such as 20th Century Fox and Adidas to take advantage. Twelve per cent of Aegis' revenue came from digital media last year.
Robert Lerwill, the Aegis chief executive, said: "Trigger brings a talented team, consistent growth and true expertise in an innovative, but effective form of marketing."