Small and medium businesses and sole-traders account for the vast majority of businesses globally, 99.9% of all enterprises in the U.K. alone. And while the existence of millions of separate companies, with their individual demands, speaks of a fragmented market, together they still represent a lot of opportunity. Today, a U.K. fintech startup looking to capitalise on that is announcing a round of growth funding to enter Europe after onboarding 20,000 customers in its home country. ANNA, a mobile-first banking, tax accounting and financial service assistant aimed at small and…