The winning Lotto numbers were 40, 03, 52, 02, 07, 20 and the bonus was 14.
Andy Carter of Camelot, Senior National Lottery Winners Advisor, said: “What fantastic news for a single ticket holder who has won the £ 13.1million jackpot” to be won “tonight.
“Players are encouraged to check their tickets and call us to claim this fantastic prize. “
The winner matched all six main numbers to win the top prize.
No one has matched five numbers, plus the bonus for a net £ 1million.
Lancelot shooter and seven boules set were used.
Saturday’s estimated jackpot now stands at £ 3.8million.
There was no winner for the £ 350,000 Lotto HotPicks First Prize, which uses the same numbers as the Lotto draw.
The Thunderball winning numbers were 32, 09, 02, 15, 23 and the Thunderball was 08.
No one won the top prize of £ 500,000.