I’ve always thought there’s something special about the last Underground train of the night. There’s a very particular atmosphere on board. An unspoken camaraderie exists among passengers, you get a more relaxed and unselfconscious ambience than at other times, plus there’s a reassuring sense of the day being done and of being almost home, where sleep beckons.

It’s hard to capture the flavour of this atmosphere in words, so here’s – drum roll! – an audio presentation of what happened recently when I took the last Northern line train of the night from Embankment to West Finchley.

Along the way I encounter British teens attempting to impress American girls, a couple having a polite argument, someone asleep on a platform, and – what are the chances? – three men discussing disused stations.