What is a Premium Bond? The second Premium Bonds winner to claim £1 million this month is from Hampshire and the Isle of Wight, with the bond number 491KF169443. Recommended reading:To find out if you have ever won a Premium Bonds prize, you will need to dig out your holder's information and head over to the prize checker. You can also use your NS&I number, which you should be able to find on any communication about your bonds. Have you ever won in the Premium Bonds?