citationneeded:

It was nicknamed the “tiddler” on account of its size, and soon became Britain’s least loved coin.^[2]The Treasury had continued to argue that the half penny was important in the fight against inflation (preventing prices from being rounded up),^[2] but by the early 1980s it was practically worthless and its main utility was as a driver of small screws.^{[citation needed]}

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(BTW [Citation Needed] is my new favourite blog)