Our new ticketing site is now live! Using either this or the original site (both powered by TrainSplit) helps support the running of the forum with every ticket purchase! Find out more and ask any questions/give us feedback in this thread!
If you miss the monorail, and there is only one in operation, then it could easily 15 minutes or a little more. If all goes well, as little as 7 minutes.
This PDF from the airport website does show a walking route. Impossible to recommend, though. Use the shuttle. Allow 25 mins from passing through the arrivals doors into the landslide area of the terminal to the departure of your intended train.
As a frequent visitor to Gatwick - I live nearby... I would highly suggest you get the Monorail - It is a direct transfer to the station as it literally comes into the station plus a 30 sec walk
Plus as mentioned - Its FREE!!!!
We are aware of an issue with emails from the Forum to Microsoft-based email accounts (hotmail/outlook/live.com email addresses). This is being looked into currently, thanks for your patience meanwhile.