Scottish Power said it would raise gas prices by an average of 34% and electricity prices by 9%, effective from Monday 1 September.
Soon after, Npower said domestic customers would see an average rise of 14% for electricity and 26% for gas, effective immediately.
Soon after, Npower said domestic customers would see an average rise of 14% for electricity and 26% for gas, effective immediately.
BBC NEWS | Business | More firms increase energy bills