Karen and David Ainger have been thunderously lucky after a life-changing Thunderball win made them £500,000 better off. They are still reeling from their good fortune and have hailed it the perfect way to round off the year.

Is Thunderball fixed?

Overall odds of winning a Thunderball prize are 1 in 13. All of the prize amounts in Thunderball are fixed, so you receive the advertised amount regardless of how many other winners there are.

What are the odds of winning Thunderball?

Thunderball top prize: 1 in 8,060,598.