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

https://www.scribd.com/document/1077066259/Heathrow-to-Gatwick-Airport-Transfers-Coach-Taxi-or-Train-174457

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.