Another thing that might or might not be an issue.
If you are in the UK and after Brexit your EASA licence becomes invalid and you get a UK licence, that will probably render your 61.75 invalid too, especially if the licence number changes.
You might be able to use the quick way to revalidate that was available for the EASA licence change, but who knows.
Of course all of the above is full of "if" as we do know what will happen yet.