Yes again.

Before we changed we had 12 pence (symbol d, apparently from denarii) to the shilling, and twenty shillings (symbol s) to the pound (symbol £) so 240 pence to the pound.

About 1970 (too lazy to check) we "went decimal" and dumped what was sometimes called Lsd. The pound was unchanged, but its fractions became 100 "New Pence", after a while the "New" bit got dropped because they weren't, although the New Forest is still new hundreds of years after it was designated. In short, one penny (now) = 2.4 old pennies, and weighs about one fifth as much.

Guineas (used for such delicate matters as horsetrading, fines, paying ones tailor , professional fees, or bribing justices) were 21 shillings, they were a sneaky way to make a price seem less: nine and a half gns sounded rather less than ten pounds, but at £9/19/6d it amounted to just 6d less (0.25%).