What is the minimum numbers needed to win on thunderball?

To win the Thunderball lottery in the UK, players need to match at least three main numbers, which are drawn from a pool of 1 to 39. Additionally, players can also win by matching the Thunderball number, which is drawn from a separate pool of 1 to 14. The minimum winning combination involves matching three main numbers or one main number plus the Thunderball. Prizes increase with the number of matches, including jackpot prizes for matching all five main numbers and the Thunderball.