Yes, from Monday Spain allowed visitors in from the UK whether they had proof or not of vaccination.
They need the money
However, the UK is the worlds leading light for vaccinations and we still adhere to social distancing and wearing masks so it should not be anywhere as bad are some are trying to make out
I also have to point out that getting a flight to Corvera is an absolute nightmare as the airport is not fully open and as of today, Easyjet has very few, if any flights there from from Gatwick even for the month of July
Of course Alicante is better placed but even so, I do not think you will see the massive sudden influx that the Spanish authorities are hoping for