Frank's contract is believed to be worth at least £250,000 a year.
The RWE-owned company said a consumer and youth specialist would be better suited to the work.
Frank MD Andrew Bloch said the agency's brief was to promote npower as a ‘challenger brand' to rivals such as British Gas and Eon-owned Powergen. Jackie Cooper PR and Cake held discussions with npower over the brief.
August.One will continue to work for npower but will focus on promoting its environmental and CSR activities. Ptarmigan PR is handling community-based projects. ‘We need to reach groups who are not normally interested in energy-efficiency, and to do that we need to avoid negativity and make energy interesting,' said Bloch.
The firm is keen to gain maximum exposure for initiatives such as green-electricity tariff Juice - which offers energy from renewable sources - and energy-efficiency campaigns. Although he would not be drawn on npower's PR budget for the next 12 months, head of PR Richard Frost said the company was ‘putting increased importance on PR'.
The agency is using Lenny Henry to find the country's ‘top light-bulb jokes' as part of its bid to raise awareness of energy- efficiency.