Where were lead, iron, silver, and gold mined in Roman Britain?

In Roman Britain, the extraction of minerals was a significant economic activity, particularly during the first two centuries of occupation. The locations of these mining operations were as follows:

• Lead and Silver: Lead was mined extensively in Somerset (specifically the Mendip hills), Shropshire, Flintshire, Derbyshire, and Yorkshire. Silver was primarily obtained as a byproduct of lead extraction.12
• Iron: Iron production occurred in the Weald of west Sussex, the Forest of Dean, and to a lesser extent in various other districts.1
• Gold: While gold was known to exist in Britain, it proved to be relatively scarce. The most notable large-scale operation was a gold mine located at Dolaucothi in Carmarthenshire, Wales.12

While these industries were initially exploited by foreign capitalists and under military control, they played a vital role in the economic development of the region.2