Bond 332GB855665 has won its investor the top prize. It was bought in June 2018 as part of an overall holding of £38,000.

The second bond, which has made its owner a millionaire, is 209DZ100774. This was bought in July 2013 as part of an overall holding of £25,004.

NS&I has introduced a reduction in interest rates - how will this affect the number of prizes in future draws?

In November, NS&I reduced its interest rates, which means the chances of any £1 Premium Bond number winning have reduced from 24,500/1 to 34,500/1.

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