Premium Bonds Prize Checker

The tool verifies potential winnings by mapping user-provided bond numbers to published prize results for a given draw period.
For each input, the number is validated to a 6–7 digit numeric string; the system checks if this number appears among the winning numbers for the selected draw, then returns the corresponding prize tier and GBP amount. When multiple numbers are supplied, the tool processes them in batch, producing a per-number result set. It supports single-draw checks and multi-draw history comparisons by selecting the draw week. The results are designed for quick interpretation and auditability, with clear indicators for winners and non-winners. This is intended for NS&I Premium Bonds holders, savers tracking portfolios, and small advisory teams who want a fast verifier without navigating multiple official pages.