Due to the fact that the fix ends next year, you will suddenly see all the price increases we have had in the last 1/2 years at once applied to your bill.
ie, we fixed when the cap was £1200 - this will change to £3500 after the fix ends which is a 191% increase on our expected bills next year. So my summer usage will go from roughly £40 to £120 next year.
Doesn't change the fact that if you are fixed on a lower rate you are saving money compared to people who aren't currently, but it will get you in the end anyway.