Takings in Welsh pubs were up 41% after yesterday's home nations derby when Wales' football team took on England in the European Championships.
The results come from a snapshot poll of 500 pubs across England and Wales from retail tech startup Epos Now.
Takings were up 41% between 5pm and midnight compared to an average Thursday in June; while English pubs saw just a 32% increase over the same period.
Across the day as a whole, English pubs saw a 22% increase in sales, with Welsh pub revenues up 31%.
Jacyn Heavens, founder of Epos Now, said: "England taking on Wales in a major tournament was always going to be a huge bonus for pubs and bars across the UK and it is great to see supporters from both nations getting together and having a good time before and after the game."
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