The Warm Home Discount is a separate issue - this has been increased to £150 and has to be applied for through your energy company, applications usually open in October.
They have said it will increase Saetana. Again, I won't hold my breath.
If you are on Pension Credit, you are in the "core" group and it remains the case that you do not have to apply.
However, if the changes happen as they have said they will, from July, this payment will increase to £150. However, only those with high energy costs who claim a means-tested benefit will be eligible under the changes. Those with disabilities who only claim personal independence payments, attendance allowance or disability living allowance, which are not means-tested, will no longer get the warm home discount - affecting 290,000 existing claimants. To keep getting the rebate, you'll need to have high energy bills AND be eligible for one of the qualifying means-tested benefits. [Source: Money Saving Expert]
They have said it is intended the Warm Home Discount will go to more people with high energy bills which is a good thing. However, others who have received it in the past, may not get it. All this makes the benefits system yet more difficult to negotiate and will mean those who are depressed, anxious, don't have access to the internet, etc., may well just give up.
There is a useful chart here showing the Before July 2022 and After July 2022 position.