Second £1m premium bond prize to launch
From August onwards, two people every month will get the chance to become a premium bond millionaire.
Premium Bonds, which were first launched in the 1950s, can be bought with a minimum of £100 and allow owners to win cash prizes.
The maximum premium bond holding will be increased from £30,000 to £40,000 from 1 June and from next year will rise to £50,000.
Julian Hynd, retail director of National Savings and Investments, explained the changes to BBC Radio 5 live's Wake Up to Money.
30 May 2014