Transition time on the Southern. There was a long period after the June 1986 introduction of the colourful Network SouthEast colours scheme, when old and new stock ran together. On the third rail network, where a lot of trains were formed from two four car units, this led to the situation seen here, with half the train in the new colour scheme, and half still in blue and grey livery. Class 421 4-CIG 7418 brings up the rear 09:13 Portsmouth Harbour to Waterloo service at Milford on 2 May 1987. The leading NSE livered unit is classmate 7357.