No Martyn. They are saying that, as a legal Spanish resident, you are able to return to your country of residence, Spain. This is under the COVID restrictions umbrella, nothing to do with Brexit
There is no reason to suppose that as and when the Spanish government determines that COVID is sufficiently under “control”, holiday makers, second home owners, et al, would be denied entry.
Last March, when SA locked off its airspace. I, and many thousands of others, were, until gov.U.K. negotiated our repatriation, stuck there. Initially, though it wasn’t widely known at the time, the SA government refused all repatriation flights.
When these flights were allowed, they refused to allow their own residents access to outward bound flights; they arrived empty, with two sets of crew on board
I’m saying this only to exemplify that governments are imposing rules/conditions in order to keep their residents safe. We might agree, or not 🤪🥂