Weird article. It reads as-if it's a new discovery, yet the "tin comes from England" meme appears in 2K yo maps ( https://en.wikipedia.org/wiki/Cassiterides ). In the "Haifa marine Museum" you've never heard of, there are tin pieces found in Phoenician ships, that's ~3K yo and IIRC the sign even says the Tin is from today's England. [edit: of course this piece could be referencing new confirmation or new methodology…
This is about tin from over a millennium before that map.
> we'll never know, as there are no references to anything of substance
The spectrometer, diffractomer, and xray analysis isn't substance?