Mustoes beat Euro RSCG, DFGW and the incumbent, Rainey Kelly Campbell Roalfe/Y&R, which held the account for five years, after a statutory review held as part of an overhaul of EST's marketing strategy.
Rainey Kelly Campbell/Y&R ran campaigns such as "Multiply", which looked at the link between domestic energy wastage and the global issue of climate change. A television ad featured people pouring scorn on energy-saving measures such as not leaving the TV on standby and not filling the kettle to the top.
The Energy Saving Trust launched a £3m campaign on February 14 to promote energy efficiency in the home, to link with the activities of energy suppliers under the Energy Efficiency Commitment.
Janet Morris, director of marketing at EST, said: "Both agencies are excellent in their field and will further enhance our marketing strategy to maximise our impact on reducing energy consumption, to cut carbon dioxide emissions and, therefore, reduce our impact on climate change."
Morris added that the EST was at a turning point and set to move to the next level of promoting energy efficiency, with a stronger, more focused proposition that provides consumers with information and advice to bring sustainable, energy efficient living, to everyone's daily lives.
"These agencies understood and addressed this change from a strategic perspective and developed excellent creative solutions to support our drive to change consumer behaviour," Morris said.
It is understood that the trust is looking to move away from the strategy of benefit-focused ads to adopt an overarching brand strategy.
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