The UK in particular is a country that's largely responsible for eSport's quick growth into the competitive behemoth we see today. ESL is the leading eSports brand in the UK and it's been home to many betting-dominant games such as LOL, CSGO and Overwatch.
The exciting thing is eSports is continuing to see significant growth within the country, this will only make the activity more popular and give way to more betting platforms to arise and satisfy the market.