After December 31st British people will not be able to enter Spain like before. The time they can legally be in Spain will only be 90 days. After that they will have to leave the country and stay out for 180 days. The DGT has set up a protocol to do the exchange susbstitution and renewal of the british permites under the same conditions prior to leaving the EU as long as the applications were submitted until the 30th of December 2020.
Angeles Barbero 