Can I ask what is the difference with above transports to Victoria station apart from price? The Gatwick Express is £53.60 return for 2 Adults whereas I can get Southern Rail for £12.00 return for booking specific times. Its probably a no-brainer, but just wondering whats the big difference? Is it far from departure lounge in Gatwick airport to railway station? Also, I believe the day we are arriving is the London marathon. Will there be any restrictions to get into the city? Thanks.