European fintech hubs post-Brexit

As a result of Brexit, some European capitals could become big new fintech hubs. Joe Wallen on Forbes indicates three cities.
Tallinn: with over 400 startups, it is called the “Silicon Valley on the Baltic Sea” and Estonia has the third highest concentration of startups across Europe.
Lisbon: the Portuguese technology sector is rapidly growing (both venture capital and in private equity investments) and the city has the highest European rate of female startups
Sofia: Bulgaria has the second fastest broadband service in the world after South Korea and the most favorable European tax system for companies with very low day-to-day running costs.