I'm applying for a fellowship in continental Europe (Spain) and have been asked what grade I received. I think in many countries it's normal to receive grades over the course of a PhD, as well as an overall grade (of the form "with distinction", "cum laude" etc.) but this isn't common in the UK, where I received my PhD.
How should I answer the question? "N/A" seems most obvious, but should I explain in a footnote why I received no grade?