I was late this morning and the 08:30 had only four carriages which shlould have meant a complete crush or that I could not get on but the train was strangley empty. I can't work this one out yet. Perhaps the two carriages from Tattenham Corner that they attach at Purley are normally full of people who spread out along the whole train at Purley.
Naturally we arrived 3 minutes late despite a small light train.