Question: What company services Croydon and operated the Thameslink Great Northern franchise?
Sentence (from "Economy of the London Borough of Croydon"): London Gatwick Airport is located to the direct south of the town and has scheduled flights to destinations within Europe, North America and Asia, although has tough competition from the even bigger London Heathrow Airport to the west but has managed to stay the UK's second busiest airport.
Relevant evidence: No