I think you're getting a bit mixed up with what charges are being reduced and who is responsible for what. Let me help you to understand. A simple search reveals the following regarding changes that come into place next week:
Key Changes to Your Bill
The reduction is achieved by shifting certain policy costs from energy bills to general taxation:
GOV.UK +4
- Ending the ECO Scheme: Funding for the Energy Company Obligation (ECO) scheme, which was previously added to bills, will end on 31 March 2026.
- Reducing Renewables Obligation (RO) Costs: The government is removing 75% of the costs for the Renewables Obligation scheme from household bills, funding them through general taxation instead.
- Lower Standing Charges: A portion of these changes involves removing Warm Home Discount funding from standing charges, which is expected to lower the fixed daily cost of having an energy supply by roughly £39 a year
So the above are the government imposed charges that are due to be removed or reduced from next week. That makes up the £117 you refer to. However those charges are simply being moved onto general taxation so are being levied in a different way.
Then we have the price cap that the regulator determines for 3 month periods and which the government has no direct control over. That will fall for the next 3 months. However, the way it is reported, for some reason, is always for what it means annually. So when the media say it will reduce the average bill by, say, £300 that is over the course of a year so that figure can be divided by 4, so in this case the reduction is £75
assuming you are not on a fixed tariff and that you use the average amount. Remember all of the figures are an average and the best way to save money is to actually use a bit less.
Of course the price cap only applies to those that are on a variable tariff. It is down to individual suppliers if they decide to pass on any savings when the cap falls. Some do, some don't.
I
t is a common trait with some posters that they seem to blame the government for absolutely everything when it is actually the way an open market operates (not always in the most efficient manner but that's down to the regulator).
I hope this helps you to understand how your bills are constructed and that you can see which parts are government controlled and which are not.