The woman has become the scheme's 137th millionaire

The woman, who has not been named but lives in Hampshire, won a �1m jackpot prize on a bond she bought in June to become the scheme's 137th millionaire.

She was one of two people to win the jackpot after investing �5,000 out of a maximum possible investment of �30,000.

For the first time, National Savings and Investments gave away two �1m Premium Bond prizes in the same month.

Both winners are married women aged in their 50s, a NS&I spokeswoman said.

The second winner, from Bristol, has a total of �11,550 in Premium Bonds and bought her winning bond in November 1998.