Leading Suppliers Nationally for Copper Mining Companies

The United Kingdom doesn't have significant copper mining operations. However, there are companies involved in copper exploration, production, and trading. Here are some notable companies:

1. Anglo American: A global mining company with operations in copper mining and exploration.

2. Antofagasta PLC: A Chilean-based company listed on the London Stock Exchange, with copper mining activities worldwide.

3. Glencore: A diversified natural resources company with copper mining operations among its portfolio.

Please note that these companies are not exclusively focused on copper mining and have diversified portfolios across various commodities and minerals.