The final pitch was whittled down to three agencies from an original field of ten. It included all of RWE's incumbent agencies: Vizeum, which handled npower's offline business; MediaCom, which covered npower's online business, and ZenithOptimedia, which was responsible for Thames Water.
With a media budget of more than £6 million, npower is RWE's largest division in the UK and is planning to boost its online marketing next year. This formed a major part of the pitch.
The utilities giant is also planning to increase its advertising spend on Thames Water in the coming year as the company prepares for its involvement in the 2012 Olympics in London.
RWE is also looking to expand its business in the UK through a series of acquisitions, following the recent news that its main competitor, EON, is attempting to purchase the utilities company ScottishPower.
The Thames Water and npower procurement divisions handled the review.