The government has announced an extension to the financial support provided to Horizon Europe applicants, originally launched in November 2021 https://www.gov.uk/government/news/government-extends-horizon-europe-financial-safety-net.
The funding will continue to be delivered by UKRI. Details regarding the scope and terms of the extension are available on the UKRI website https://www.ukri.org/apply-for-funding/apply-for-horizon-europe-guarantee-funding/