UK-Greece-UK-Balearics travel

[SingingWaffleDoggy]

Apologies if the answer is simple. If travelling to the Balearics within 48hrs of return from another destination (Greece) are there any further restrictions that apply, or is it simply following the double jabbed rule for UK travelers?
If restrictions to/ from Greece were to heighten would this then impact on further travel once home and setting out on a separate trip bearing in mind that the UK are unlikely to bring in testing on return with relaxing measures?
(Keeping fingers crossed we don’t get a new variant throwing everything up in the air)

Greece is in the EU. So is Spain. Having been to Greece recently doesn’t ‘add’ any restrictions to actually entering Spain.

You have to declare on your SPTH form which countries you have been in during the 14 days prior to arrival but there are no additional restrictions to fellow EU countries. Unless Greece was suddenly declared a high risk country, which I doubt will ever happen.