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Lottery bosses are to make the jackpot even harder to win in the biggest shake-up of the game’s 21-year history.

From October, the odds of land­ing the top prize will be 45 million to one as bosses add 10 numbers to the pool.

But there are two new ­£1million raffles a week and more rollovers.

Campaigners fear it will encourage gambling. But Camelot chief Andy Duncan insisted: “The intention is to keep the game fresh, not get people to spend more money on a new line.”

The odds of winning the jackpot at the moment are 14 million to one. With 59 numbers to choose from instead of the current 49, the chances are much slimmer.

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But Camelot said the new look lotto boosts the hopes of scooping any prize from one in 54 to one in 9.3. The chances of being a ­millionaire rise from one in 14 million to one in 10 million.

Mr Duncan also said for the first time punters who match two numbers will win a prize – a free lucky dip.

And the current limit of four rollovers will be scrapped in favour of a £50million jackpot cap. Once the pot reaches that, there will be one more rollover and the prize must be won.

If nobody matches six numbers, it will be given to ticket holders with five numbers and a bonus ball. The price of a lottery ticket will remain at £2.

Gambling Reform and Society Perception spokesman Eugene Farrar said: “We are concerned that people’s chances of winning have been shortened so they will compensate for this by buying more tickets.”

James Mildred, of ­Christian Action Research and Education, added: “Clearly the motivation is to sell more tickets.”

The worse odds did not go down well with punters. Seamus Valentine tweeted: “Doubling the price of the ticket was greedy enough. This is desperation.”

But Mr Duncan said: “We are offering more chances than ever for people to become a millionaire.”

(Image: PA)

The main changes

Number of balls goes up from 1-49 to 1-59

Odds of winning jackpot (six numbers) lengthen from 1 in 14 million to 1 in 45 million

Odds of becoming a millionaire shorten from 1 in 14 million to 1 in 10 million

Rollovers to peak at a maximum £50million plus final draw. Jackpot currently capped after four draws

New £1million raffle prize every Wednesday and Saturday. Existing £20,000 raffle prizes retained

For first time two matching balls will win a prize – a lucky dip ticket for the next game

The coupons will be bigger to cope with extra numbers

Lilac balls numbered 50-59 will be added to the white, blue, pink, green and yellow balls

(Image: PA)

Meanwhile, a £1million lotto prize has been shared among charities after the unlucky winner who bought it in Stirling failed to claim the cash.

The winning ticket for the Lotto quadruple rollover draw on December 17 last year had been bought in Stirling but no one came forward despite appeals in the area.

With the deadline expired, the £3,062,272 prize, plus the interest it earned, has gone to help lottery-funded projects across the UK.

The National Lottery said prizes can be claimed up to 180 days after the draw, at which point they are split between charities.

Some in Stirling will still benefit from the money as charity Plus Limited received funding from the unclaimed prize towards a programme of outdoor activities designed to engage young disabled people in physical activity.