A report made by Bet-Bonuscode.co.uk and published by The Business Insider website said the amount of money that was staked on the match last weekend was roughly five times as much was bet on Mayweather's 2015 fight against Manny Pacquiao.
The firm works closely with bookmakers and has collected figures from William Hill, Ladbrokes, Bet365.com, Coral, BetFred, and Betway on the fight. At the moment, backers of Mayweather are in-line for £50 million in payouts — a paper saving of £250 million for Britain's bookmakers.
Alexander Kostin of Bet-Bonuscode.co.uk said Leicester City's surprise Premier League victory last year has helped bookies by encouraging betters to put money on long-odds competitors in the hopes of a big payout.
Kostin said: "The hit the bookies took back in 2016 has actually turned out to have been a great marketing opportunity for sports betting, as proven by the Mayweather vs McGregor fight, that ended up working in the bookies favour."