That would equate to about 1.3 million people in Great Britain with a gambling problem, although the commission has yet to come up with its own population estimate and will use a larger survey conducted over a longer period of time in future. The figure, which was based on a telephone survey, has been latched on to by betting industry lobbyists as evidence that levels of harm associated with bookmakers and online casinos are relatively limited.īut on Thursday, the commission published “higher quality” figures, based on an updated methodology, that suggest that as many as 2.5% of the adult British population may be suffering from problem gambling.