Shares were down 45.05 pence, or 34%, at 85.95 pence in early afternoon European trading, having hit a low of 68.05 pence earlier in the session and marking their lowest level since January 2017.

U.S. tariffs could cause the prices of steel and aluminum cans to rise, an increase that may ultimately be passed on to consumers.

The vast majority of steel and aluminum exports go to the U.S. Just how heavy is this reliance? These graphics put the trade ...