The bookmakers in Britain are enjoying the London Olympic Games because the number of bettors on the sporting events has never been higher.

The 2012 Games has caused sport betting to double its numbers at Betfair and William Hill. It is estimated that nearly $30 million British pounds will be wagered by the conclusion of the Olympics on Sunday.

Nearly 70 percent of active bettors have placed at least one bet on the Games, according to research by the bookmakers. Most of these bets have been placed on soccer and tennis events.

William Hill have a number of Olympic closing ceremony prop bets available for bettors to have some fun with Sunday:

3/1 Closing ceremony to attract more viewers than opening ceremony
4/1 Rain during the closing ceremony
8/1 Spice Girls to perform without Posh Spice
12/1 James Bond to be seated in the vicinity of the Queen
16/1 Boris Johnson to drop the Olympic Flag, whilst handing it over to the president of the IOC
66/1 Boris Johnson to singe his hair on the Olympic flame
100/1 Boris Johnson to zip-wire into the Olympic stadium
200/1 David Cameron to confirm that a UFO appeared above the Olympic stadium during the closing ceremony

William Hill's betting on the color of the Queen's Hat at the Olympic Closing Ceremony:

3-1 Blue
5-1 Gold
5-1 Yellow
6-1 Purple
7-1 White
8-1 Peach/Apricot
8-1 Pink,
10-1 Cream / Beige
12-1 Green
12-1 Turquoise
16-1 Brown
16-1 Bronze
16-1 Red
20-1 Grey / Silver
25-1 Black
100-1 Union Jack Design, other colors on request