I received a letter today from npower basically advising that they will no longer be supporting economy 10 (or economy 7 by the looks of it) for existing customers from 1st October. My bill is shooting up by £303.44 per year due to this. Luckily I should be moving house soon, so not really an issue unless I have to stay beyond October. I’ve tried to switch a few times, but most of the competitors who support economy 10 either charged more, or about the same as npower. Now would be a good time to switch if you found yourself in the same position as me.