European stocks tumble after the UK adds six more countries to its COVID-19 travel quarantine list

· *European stocks fell on Friday as the UK added six more countries to its 14-day COVID-19 quarantine list.*
· *The UK's benchmark FTSE 100 fell 1.9% and the Euro Stoxx 50 dropped 1.6% in early European trading.*
· *The decision, which comes into effect Saturday, implies that travellers arriving in the UK from countries...