More pensioners volition dice due to the fact that of the determination to retreat the wintertime substance payment, Wales' older people's commissioner has said.
Rhian Bowen-Davies said UK ministers needed to reverse the determination that volition spot 90% of pensioners betwixt 66 and 79 suffer the payment.
The Labour-run UK authorities said cuts were indispensable to code what it called the fiscal "black hole" it inherited from the Conservatives.
"People volition consciousness the interaction of this," said Ms Bowen-Davies. "We cognize that this could interaction connected 4,000 further deaths this winter."
Shelia Burgess from Magor, Monmouthshire, who began moving astatine 15, thought she would beryllium capable to assertion her authorities pension astatine 60, but was past caught retired by authorities changes to the rules.
She is 1 of the alleged Waspi women who were calved successful the 1950s and accidental they didn't person capable clip to hole for the information that they would person to enactment years longer earlier being capable to assertion their authorities pension.
Ms Burgess is present expecting to suffer the winter substance payment which had been "something that made america not person to interest if the upwind got precise cold".
"I admit it's not a immense magnitude of wealth but that £300 during the wintertime months is simply a large help," she said.
The UK government's ain figures showed 83% of radical implicit 80 would suffer the payment, rising to 90% of those aged 66 to 79.
Other groups volition suffer retired too, with 71% of pensioners with disabilities having the outgo taken away.
Disability Wales main enforcement Rhian Davies said immoderate radical needed each penny.
"They request to person lukewarm homes [and] possibly due to the fact that of imaginativeness impairment they'll request to person bully lighting. They request to beryllium moving equipment.
"Many disabled radical of immoderate property often person higher substance costs and request to person greater usage of electricity, heating, straight related to their impairment."
The plight of Welsh pensioners was raised by Plaid Cymru's Caerfyrddin MP, Ann Davies, during Prime Minister's Questions erstwhile she highlighted the lawsuit of constituent, Janette Crawford, whom she said suffered with ME and chronic pain.
"The cold, damp conditions of a Welsh wintertime are going to mean a batch much musculus soreness and fatigue for her," she said.
"She has mislaid her wintertime substance payments owed to having a precise tiny savings pot.
"With 86% of pensioners successful poverty, oregon conscionable supra that line, to miss retired successful Wales, volition the premier curate found a societal vigor tariff to assistance radical similar Janette?"
Sir Keir Starmer said his authorities had "inherited a £22bn achromatic hole" and Conservative MPs "should beryllium apologising... for leaving the state successful specified a state".
He said authorities was committed to the pension "triple lock" which would summation by £460 adjacent year.
"That means pensioners nether Labour volition beryllium amended disconnected due to the fact that we are going to stabilise the system aft that batch mislaid power of it," helium said.
Pension adept Helen Morrissey, caput of status investigation astatine concern steadfast Hargreaves Lansdown, said radical who person mislaid the outgo had options specified arsenic applying for pension credit.
"You tin look to spot if you tin suffice for the warm location discount, which is simply a rebate of £150 disconnected your substance bills… if you are genuinely truly struggling with these vigor bills this winter, talk to your supplier and spot if they tin assistance you," she said.
She does not deliberation Chancellor Rachel Reeves volition alteration people during this month's Budget but "one happening that could possibly hap is to possibly soften it astir the edges a bit".
She said that could see immoderate benignant of enactment for radical who "don't rather suffice for pension credit".