The business is a crucial win for the agency's chief executive, Ben Langdon; this week, Argos, the agency's second-largest client, announced a review through the AAR.
The income from the News Group win is estimated at £700,000, while that from Argos is valued at £2 million.
The News Group pitch, which was also handled by the AAR, was called by Roland Agamber, who joined News Group as its marketing director in October last year.
The review brought to an end the publisher's ten-year relationship with TBWA\ London, which created the "We love it" and "Big on a Sunday" straplines for The Sun and the News of the World respectively.
The business Euro RSCG has won includes all above-the-line work, including tactical, product and brand advertising. Much of it will be promotion-led television work, but the brief also includes print and radio.
Both newspapers are battling against falling readerships. April's year-on-year circulation figures revealed that The Sun was down 2.61 per cent to 3,258,402, while the News of the World was down 4.97 per cent to 3,639,143. The Sun was backed by a £13 million spend in 2004, while the News of the World was supported with a £7 million budget.
Agamber plans to continue using the lines introduced by TBWA, but said brand audits on the titles would be carried out. He added: "It was a tough call between the three agencies, which all demonstrated their desire to represent two of the country's biggest and best-loved brands."
Langdon added: "We are overjoyed to have been chosen to handle this account and look forward to delivering some exceptional work for News Group Newspapers."
- Comment, page 40.