On 14th January the government announced that from 15th May 2019 they will be introducing a change to Pension Credit entitlement for couples. At the moment a couple can jointly claim Pension Credit as soon as the older partner reaches State Pension age. From May, couples will only be entitled to claim once the younger partner has reached that age. The bigger the age gap, the bigger the potential negative financial impact will be, and it is possible that the scale of the losses may drive some couples apart.
The government says that mixed age couples with a partner under State Pension age already in receipt of Pension Credit or pension-age Housing Benefit at the point of change will be unaffected while they remain entitled to either benefit. If a mixed age couple claim working age benefits, the pensioner partner will not be subject to work-based conditionality. Any work-based conditionality for the younger partner will be tailored to meet their circumstances.
Please see https://www.gov.uk/government/news/changes-to-benefits-for-mixed-age-couples for more information.