Funnily enough, metal-bodied kettles dont need to have the body earthed, so long as the element is; unless they've changed it recently. I know because if you PAT test a kettle, you must clip the earth croc lead on the element itself, not on a spout or handle.
I assume your perc has one of those scraping earth connectors, don't forget alot of Europe still does! And your house has an RCD of course.