The answer?
None of them are strictly speaking true. As I am close to clueless when it comes to biology, I will focus on the final point, state pension eligibility.
You will read on numerous websites that, in order to qualify for a Spanish state pension, you have to have paid into the Spanish system for at least 15 years and that two of these years must be within the 15-year period immediately preceding the pension claim. However, what is generally omitted from the text is the fact that years of contributions in other countries, including the UK (despite Brexit), can be added to the years in Spain. In order to pounce on any uncertainty which might be created by my statement, I will illustrate my point with an example:
– Years in the UK system – 22
– Years in the Spanish system – 10
Although 10 is less than 15, the 22 years of UK contributions takes the total number of years over 15, i.e. 32 (10 + 22). This does not mean that one claims 32 years from the UK, or even Spain, but, in this example, there will be an entitlement of 22 years’ worth of state pension from the UK and 10 years of Spanish state pension (as long as contributions were made to the Spanish system in 2 of the 15 years prior to claiming the pension).