As with most of the rest of Europe, Britain stopped issuing pure copper coins in the mid-1800s. "Bronze" and "copper" tend to look pretty much the same until the non-copper fraction gets above 10%. The official alloy for a 1962 penny is 97% copper, 2.5% zinc, 0.5% tin - a bronze alloy with a slightly higher copper content than the bronze alloy used in American cents.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis