This is incorrect, the last two digits on train numbers are not route specific. On the Southern EMU'S/33's etc carried two digit route codes, eg (on the SW division) 81-83 was Waterloo to Portsmouth line stations via Guildford. The 'route' part of a four character headcode/train number/digit is the letter, 'P' now being Waterloo to Portsmouth via Guildford for example. The last two numbers are the individual train on any given day so the 0730 Waterloo to Portsmouth might be 1P05, the 0830 1P07 etc etc. As most know there are also regional destination letters, eg 'V' is any other region to the Western, 'O' to the Southern and so on. No doub't most of this is 'coals to Newcastle'!!!!
