Some of the most common bonus ball numbers that have been seen in the U.K. lottery system as of October 2014 are 8, 37, 45, 9, 11 and 38. Eight has appeared the most often in U.K. lotto history, with 32 appearances. It last appeared on March 15, 2014.
The bonus ball appears in the Lotto game run by the National Lottery of the United Kingdom. The lotto can be played by choosing six different numbers from 1 to 49. The bonus ball only provides a benefit to players who match at least five out of the six weekly lotto numbers.