First of all, really funny typo, I didn't know you could rent cats! Second: it depends. In EU the national license is international across EU. ~~But in UK (thanks brexit) I think now (or soon) you'll be required an international driving permit to drive in EU with a UK licence.~~ I was wrong, things changed since last time I checked, thanks for correcting me.

It's really down to the agreements between countries in the end