Football finance expert Esteve Calzada said that the U.K.'s exit from the European Union could trigger an "aggressive summer of Premier League spending and increased transfer fees," according to Jefferson Lake of SKY SPORTS. The amount British clubs will pay to buy players from abroad "should increase" by 10% because of the drop in value of the pound against the Euro by that margin. And there "could be a flurry of purchasing when the transfer window reopens on July 1 as clubs look to protect themselves" against any forthcoming changes in regulations as a result of Britain's exit from the EU. Last season 432 European players, including Dimitri Payet at West Ham and Anthony Martial at ManU, were registered to play in the Premier League. Those players "are unlikely to have to leave following the vote," but new players will "not have an automatic right" to live and work in the U.K. Former Barcelona Chief Marketing & Commercial Officer Calzada said, "It could have a massive impact, although it is still early to say. The pound is down 10 percent against the Euro so the immediate consequence is that English clubs will have to pay more. ... It remains to be seen what will happen in terms of regulation; it could be very significant for the Premier League because they have been the driving force in European transfers, they account for 50 percent of them." But while the post-EU referendum changes will impact the Premier League transfer market, Calzada feels Euro 2016 "will have less of an influence on prices because clubs have already done most of their background work" on potential targets over the course of the season. He added, "A tournament will always have an influence but it is less and less relevant because, as opposed to what has happened in the past, scouts can easily watch players over the course of a season rather than just in the big tournament" (SKY SPORTS, 6/28).