NPower has a split price for gas consumption, now at 6.504 p per kWh for the first 4572Kwh/year and 2.098 for the following. In their own website is a table to be found how many of these units are to be charged per month. http://www.npower.com/web/At_home/customer_service/yourquestionsanswered/faq_understanding_my_prices I received a bill in the beginning of November charging me only on the higher charge and after complaining and submitting a new meter reading I received an amended bill with exactly the same mistake. I had to complain... read full review »