The requirement applies to all holidaymakers over 12 years old. Spain defines fully vaccinated as being double jabbed.
Many British families have had problems with the rule, as children under 12 are usually not double vaccinated in the UK.
On Twitter, Ruth Valentine said: “We have holiday to Spain booked six days after daughter turns 12 years old. Impossible to get two vaccines. Shouldn’t it be over 12 years and three months? Loophole?”
And Mrs B replied: “We have this same scenario! Daughter turns 12 at the end of July, going to Spain on the 4th…
“From what I’m reading she won’t be able to enter even if we paid for PCR tests.”