I've been sending a barrage of emails: to the spanish CAA (AESA), to the IAA, and to CATS (my ground school).
The only answer I got was from this last one: "Your exams with be valid in any EASA approved country. ".
I've been also reading about brexit, and apparently there is a "transition period" aranged between UK and EU that lasts to december 2020. I don't know what this period i'ts totally ignored in the EASA document.
I will soon become an international law expert