According to various online sources, including the Gambling Commission, Statista & PlayToday, the ratio of men vs. women gambling is 2:1, with 64% of gamblers being men compared to 36% of them being women.
At the same time, the majority of people who gamble are aged 25-45. There is a slight increase in retired people who turn to gambling in their 60s and 70s, but this is mainly due to the population ageing faster rates in recent years.