Vitesse, the London-based fintech that offers real-time cross-border payments for businesses, has raised £6.6 million in Series A funding. The round is led by Octopus Ventures, with participation from existing backers including Hoxton Ventures and various angel investors. The company says the new investment will be used for growth, including building out its sales and marketing functions, and expanding Vitesse’s footprint in the U.S. market. It will also further invest in the “reach and speed” of its banking capabilities in order to meet customer demand as the fintech expands globally….