I saw a list of European unicorns (on HN in fact I think) and probably about 2/3 were UK/London based. That’s right now. The other ones are scattered around, so this might be your best bet in this part of the world.<p>As another comment says, you’ll mostly get political comments, so here goes: UK universities, while still very good, are dropping quite significantly in various league tables since Brexit. This is for a range of reasons: non-UK applicants now get a full US-style price, with little support or loans. They are less attractive for academics too. 2/3 of UK unis dropped since the Brexit votes, Cambridge is at a historical low of 7th in the world, behind ETH. Student visas are sth like £1000 per year on top of that. If you think this will continue, and talented and driven young people will choose other countries, this will extinguish, in the long term, the supply of talent to startups and tech.<p>UK’s attitude to immigration will also be unpredictable. On the one hand, it states that it is keen to attract talent etc, on the other hand visas will be largely awarded based on salaries (maybe not so good for early stage startups). Also there are no guarantees that eg the partner of a visa taker will be awarded one, or that visas will be extended. This is another reason why people might give the Uk a wide berth - and these would be potentially your cofounders, colleagues, investors.<p>On the flip side, finance was thought to leave London en masse, and didn’t. Banks etc established a presence in EU countries, but most of the business logic staff are actually staying out.<p>Also UK is at heart a country of innovation, where novelty and innovation are welcome, and entrepreneurship runs in the blood, more so than in many other places. Brexit won’t change that.<p>So... who knows? I’m an EU citizen, now also British and well settled here. I like it, but probably wouldn’t choose it now.