Original sentence: In December 2008, NS&I dropped significantly the interest rate (and therefore the odds of investors winning a prize) due to the "credit crunch", leading to strong criticism from members of parliament, financial experts, and holders of premium bonds
Edited sentence: In December 2008, NS&I dropped significantly the interest rate (and therefore the odds of investors winning a prize) due to the corresponding significant drop in the Bank of England base rate during the "credit crunch", leading to strong criticism from members of parliament, financial experts, and holders of premium bonds