No Change to Exportable Benefits such as Attendance Allowance if you have Spanish Residency before 31st December 2020. People already claiming benefits such as Attendance Allowance and Carer’s Allowance from the UK will see no change in their benefits.
New claims can still be made providing you can prove you were a Spanish Resident before 31st Dec 2020. You will have to send a copy of your residency card.
UK Pensions and health care with S1 continue as before Brexit.
However UK nationals taking out Spanish residency after 31st December will no longer be able to claim Attendance Allowance or Carer’s allowance. Source gov.uk website. More information at : https://www.gov.uk/guidance/benefits-and-pensions-for-uk-nationals-in-the-eea-or-switzerland