Nope I am guessing they got this one wrong. Either it was no tool. Or the date is wrong. They need to have a lot more evidence that collaborates tool making in England 500,000 years ago. Homo Sapiens did not make it there. We need to find a few more in another place within Europe before I am believing it.
Nobody is claiming that H. sapiens was in England (or in Europe) half a million years ago. The article says that it's either the work of Neanderthals or of H. heidelbergensis (which used to be, along with H. rudolfensis, called "archaic Homo sapiens", but not the same thing).
When I was a preteen I observed stones like that on river beds in Central USA.
You don’t get to vote on it.