A hard Brexit scenario with World Trade Organisation (WTO) tariffs will put the equivalent cost of 16c/l on to milk directed to cheese destined for the UK market – a bill of €150m annually for the industry. This will make it unviable for Ireland, which exports 60% of its cheese production to the UK. The UK’s response may be to import its cheese from third countries under free trade agreements or produce it internally. Meanwhile, the Irish dairy industry, which has invested in cheese capacity to prepare for the post-quota scenario, may see some of its cheese factories mothballed.