Ticket prices for the weekly National Lottery draws will increase from £1 to £2 from 3 October, Camelot has announced.
The National Lottery operator said in January that it would double the price of a ticket for Lotto, the main National Lottery game, and predicted that the amount of money that it passes on to good causes would increase as a result.
It said at the time that the changes were being made to "rejuvenate and re-energise" the Lotto game and increase the amount it contributes to good causes.
It is the first price increase since the game started in 1994.
Camelot announced today that tickets for the "new Lotto" would go on sale on 3 October with 1,000 guaranteed £20,000 prizes and a £10m jackpot for the first two Saturday draws, on 5 and 12 October.
The updated game will also include an increase in the prize for matching three numbers from £10 to £25 and an anticipated increase in size of the average jackpot prizes from £3.9m to £5m for the Saturday draw and from £2.1m to £2.5m for the Wednesday draw.
The announcement of the changes quickly attracted more than 500 comments on the National Lottery’s Facebook page, many of which were critical of the price increase.
"The day you raise the ticket price from £1 to £2 will be the day I stop doing both the Wednesday and Saturday draws – both of which I have done since they started!!!" said one.
"Shove the lottery where the sun don’t shine, not paying £2," said another.
"That's the day I’ll stop playing then!!" said another.
Some welcomed the changes. "Love the fact 1,000 people win £20k; that’s an awesome new development," said one.
A Camelot spokeswoman responded to one comment by saying the organisation had spoken to more than 26,000 lottery players before introducing the price increase.
"Players told us they wanted more ways to win more money," she said. "The increase in price was needed to achieve this."
The National Lottery gives 28 pence in every pound to good causes and has raised more than £30bn since 1994.
Dominic Mansour, chief executive of the Health Lottery, which gives 20 pence in every pound to good causes, said the price rise was "very tough on players".
He said: "Given that the purpose of lotteries is to raise money for good causes, this shows the problems that arise for consumers when a monopoly is able to control a market and dictate terms. Health Lottery tickets will be staying at £1, and we think that is the right thing to do in a time of austerity."