charsiew: GOING to Gatwick if there are no trains to East Croydon from FH, get a BUS to East Croydon (Fairfield Halls, the 197 or the 75) and then get a train. There are usually always trains from East Croydon unless it's very early or very late.

Coming back, just do the reverse if there are no trains from East Croydon to FH.

Much cheaper than a taxi.