The pitch, handled by Creative Brief, is being overseen by ScottishPower's head of marketing, Gerry Dumbreck. A shortlist of undisclosed agencies has been drawn up with a brief to develop a more engaging brand message.
ScottishPower's business is held by the Glasgow-based agency The Bridge, which was hired in 2001. The agency has been invited to repitch.
Last month, ScottishPower, which has 5.2 million customers, became the latest utility provider to raise its prices - by 15 per cent for gas and 8 per cent for electricity.
British Gas announced an increase of 22 per cent on all its gas bills at the end of February. Days later, Powergen confirmed it was increasing prices by 24 per cent. Npower is expected to announce its own increase in coming months.
According to Ofgem's latest market report, more than 300,000 consumers are switching energy supplier on a monthly basis. Consequently, the industry is undertaking its most competitive advertising since privatisation ten years ago.