Wouldn't be the first time they went back to the tips
During the late part of World War I many Cornish tips were mined for wolframite as Allied gunmakers tried to compete with the super-hard tungsten alloys being used in German guns. Cornish miners had known about wolframite for decades and loathed the stuff because it was hard to separate from cassiterite (tin oxide) and was impossible to smelt. So when they found it, they dumped it.
But some of this is hardly news, silver and gold were regularly recovered from Cornish mines. Indium is news (if only because industrial uses only came along after the heyday of the mines) - but in retrospect not that surprising, it's much quicker to list the elements that can't be found in Cornish ores, AFAIK it is still the most mineralogically diverse region in the World.
[Sighs fondly thinking of all those hazy summer days spent looking for uranium minerals]