If your son wants to stay with npower, he'll need to let us know he's moving in by filling in our online homemover's form www.npower.com/At_home/forms/homemover/homemover_step1.aspx?hmtype=isNew. On the day of the move, he'll need to take readings from the gas and electricity meters and call us on 0845 166 3166.
If you're son is unsure which supplier to choose, he can visit a number of comparison websites such as www.uSwitch.com.