"The price has dropped because demand has dropped."
Not strictly true Gromit.
Demand has dropped for a multitude of things so have those prices dropped ?
The reason is the word the BBC article conveniently leaves out - 'derivatives', which were probably also the cause of the 2008 'Great Financial Crisis'.
The same capitalist profit accumulation scam laid bare again, this time blamed on the 'invisible hand' of those dastardly 'speculators' ; some pundits claim that for every real barrel of oil there is 60,000 paper barrels of oil(derivatives).... and for every real ounce of gold there are thousands of ounces of paper gold (derivatives), NO-ONE really knows the actual amount of this fantasy, capitalism casino sham(e), but estimates at the 2008 GFC were a worldwide derivatives market of ~ 1,400,000,000,000,000 dollars ( 1.4 quadrillion ) and now ~14 quadrillion dollars, 175 times the size of current global GDP. (~ 80 trillion dollars)
[it was an American who came up with 'derivatives' ]
https://oilprice.com/Energy/Oil-Prices/How-Oil-Prices-Are-Held-Hostage-By-Derivatives.html