The top prize has never been won on Clover Rollover, and the jackpot has steadily grown since March 2007.
William Hill spokeswoman Jennie Prest said, "William Hill have already made one interactive millionaire this year and with a seven figure Jackpot up for grabs for a GBP 1 stake, we are hoping to make a second millionaire in the next few days,"
To win the Clover Rollover jackpot, players have to get five lucky shamrocks on a line and bet the maximum £1 stake on that line. Many smaller prizes of up to £10,000 are on offer with a minimum bet of 10p a line, and players can help Lady Luck along by playing up to five lines on each spin.
Source: InfoPowa News