The silver spot price is up around 4.7% at $20.60 per ounce at around 5:30 p.m. BST (12:30 p.m. ET), a level not seen since August 2014. Earlier in the day silver passed the $21 per ounce mark for the first time since July 2014.

If gains continue, silver will see its fifth successive day of price increases, equivalent to gains of 15% in less than a week's trading. Here's how the price of silver looks on the day:

Investing.com