Brexit and horse racing -- it's complicated...Updated 11:40 AM ET, Tue March 6, 2018 Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds. Photos: Uncertain futureSome 10,000 horses move freely between the UK and Ireland, but that could all change if a "hard Brexit" is implemented. Hide Caption 1 of 5 Photos: Uncertain futureThe racing industries of both countries rely heavily on the free movement of horses: Britain for a supply of racehorses, and Ireland for the sale of them. Hide Caption 2 of 5 Photos: Uncertain futureThe British Horseracing Authority (BHA) hopes to "maintain the free movement of thoroughbreds within Europe."Hide Caption 3 of 5 Photos: Uncertain futureIrish horse breeders have already cut their stud fees following the sterling's decline against major currencies.Hide Caption 4 of 5 Photos: Uncertain futureBut the BHA also says that, while challenges remain, there are "opportunities presented by Brexit."Hide Caption 5 of 5As Britain prepares to leave the European Union, there could be big consequences for British and Irish horse racing industries.More from SportSix Nations: Ireland defeats England to secure Grand SlamOksana Masters: US Paralympian's remarkable journey from Ukraine orphanageFIFA gives VAR the green light for 2018 World CupJohn Amaechi: 'Path to greatness' for athletes should never be 'injurious, dangerous, or evil'Can motorsport still be exciting without human drivers?