From Blackfriars, City workers can catch frequent Thameslink services to Gatwick right from the heart of London

https://edwinhxtn094.cavandoragh.org/southern-railway-to-gatwick-affordable-alternatives-explained

From Blackfriars, City workers can catch frequent Thameslink services to Gatwick right from the heart of London. It’s a direct route with clear signage for airport stops.