LOTTERY fever is tipped to see ticket sales soar to three million an hour before tonight's triple rollover draw.

The £18m monster Lotto prize - only the fourth Lotto triple rollover in the Lottery's 13-year history - must be won.

If no single player hits it big by getting all six main numbers, the cash will be shared out between winners in the next prize level.

UK Lottery operator Camelot expects ticket sales to reach three million-an-hour rate at their highest point today.

Yesterday saw sales of both EuroMillions and Lotto tickets hit two million-per-hour at peak trading.

A sales upturn boosted last night's EuroMillions jackpot, according to Camelot.

The total maximum prize for both draws was boosted to £74m.

A Camelot spokesman last night described the boost the draws had had on each other.

"There is a halo effect going on where interest in both draws is pushing them up," he said.

One lucky ticketholder from Spain scooped the jackpot of £56m for matching all five numbers and the two lucky stars.

The last triple rollover was in October 2006.