The hackers who fought against Russia in the first ever nationwide cyber attack are today hailed as heroes. “I’ve been to parties where people would discuss how they fought in the cyber war,” says Pactum’s Kristjan Korjus, with a combination of pride and envy. “They had to try to get to the main server rooms and hack for several days and nights… it was really cool.” It may not sound as dramatic as aiming a gun on a battlefield, but the work of these cyber warriors was crucial in thwarting a Russian assault that could have brought down a nation. Today, as the UK prepares for a General Election, Estonia believes Britain can learn from its efforts in defending against online attacks and misinformation. “This is a country that is on the front line of digital warfare,” says Scott Dodson, Lingvist’s chief growth officer, who moved from Seattle to Tallinn several years ago. “It’s kind of a fact of life that, you know, I don’t think people in the UK or the US really appreciate… essentially this region is kind of a firewall [against Russian attacks].” That’s partly thanks to Nato’s Cooperative Cyber Defence Centre of Excellence, codenamed K5, which sits in the shadow of grey Soviet high-rises in the suburbs of Tallinn. Surrounded by barbed wire and armoured trucks, K5 looks like something out of a spy film. “We get people asking if they can tour this as part of their stag party all the time,” laughs Aari Lemmik, who heads up the centre’s communications team.