Class 421 4-CIG 1724 leads two unidentified classmates past Coulsdon on 21 September 1991 with the 10:05 Victoria to Brighton Network SouthEast service, easily identifiable by the 4 headcode. This train's only intermediate stop was East Croydon, and it took just 51 minutes to travel from London to the South Coast. A quarter of a century later the equivalent single intermediate stop journey takes two minutes longer - that's progress!