Cost and time trade-offs
Thameslink or Gatwick Express? Thameslink often wins when the train line matches the final London area. It runs through central London instead of ending at Victoria, stopping at London Bridge, Blackfriars, City Thameslink, Farringdon and St Pancras International. This can remove a Tube change entirely and reduce the pain of carrying suitcases through barriers, escalators and busy interchanges. Southern is also worth checking when Victoria is useful but the Express premium is not worth paying.