"Quite recently, sizeable amounts of indium* have been identified in ores from South Crofty (the last mine to work in Cornwall),"
They have indeed found reasonable amounts.
"and across the pasty wall the Hemerdon Mine near Plympton is about to start producing large quantities of tungsten."
I've got someone going in to see them tomorrow in fact to ask about the RE contents of their ore.
"be too surprised if some of the Cornish tips were also valuable sources of wolframite which was mined alongside tin in the 19th Century, but thrown away as being valueless and for making cassiterite hard to smelt."
Ah, no, those were all sold off to Germany in 1905-10 or so. Because the Freiberg (amazingly, where I am right now) mines were Sn W and so they had the technology to deal with mixed ores.
There are reasonable amounts of REs in the waste lakes of china clay extraction though. Plus Ta, Sc and Li. No one's quite sure if they're economic but they are there.