even £400 is a joke, for some people its probably gone up £400 a month, so they are basically just giving them 1 months free. Not sure how much effort is involved (and this is probably why they dint do this) but it should be calculated on your usage surely? ie someone who does not use much £400 will go a long way but someone who uses a long £400 is a drop in the ocean?More than doubled in a year, saw yesterday they are giving everyone a £400 credit on our bill in October now and we dont have to pay it back over 5 years anymore.
Current thinking is it will plateau in January when they move to 3 month cap change and then possibly go down a bit.