Flying abroad...2 different vaccines?

[Wellbythebloodyhell]

Has anyone gone abroad after having 2 different vaccines for their 1st and 2nd doses? Ie AZ 1st dose and Pfizer 2nd dose?
Theres something in the back of my head telling me the doses need to be the same for other countries to recognise you as fully vaccinated or has that changed now?
I'm asking specifically about flying Into Spain

From gov.uk -
www.gov.uk/foreign-travel-advice/spain/entry-requirements

"Spain will accept the UK’s proof of COVID-19 vaccination record and proof of COVID-19 vaccination issued in the Crown Dependencies."

But best to check Spain's requirements, rather than UK interpretation of their requirements.

travelsafe.spain.info/en/

From 1st November the NHS COVID Pass will be directly compatible with the EU COVID Vaccination Certificate. NHS COVID Pass users should refresh digital travel passes they have downloaded to their Apple Wallet or as PDFs to ensure they are up to date when visiting the EU member states and other countries linked to the EU DCC Gateway (such as Spain).