While it is undoubtedly a festive British tradition for public transport to go belly-up at the very time people are trying to get home to their families, London Underground is somewhat bucking the trend.
The tube will be running a standard weekday service on Christmas Eve (it's a Monday after all), but from 3pm onwards they'll start to thin out until the last trains.
As the brilliant IanVisits points out, some of the last trains on Christmas Eve actually technically run on Christmas Day, specifically:
"Bakerloo line – 00:01 at Elephant and Castle, or 00:26am at Harrow & Wealdstone.
Central line – 00:27am at West Ruislip or 00:21am at Epping.
Circle line – 00:17am at Aldgate or 00:45 at Hammersmith
District line – 00:10am at South Kensington, or 00:37am at Ealing Broadway
Hammersmith & City line – 00:38am at Baker Street, or 00:56am at Barking
Jubilee line – 00:22am at Stanmore
Metropolitan line – 00:58am at Uxbridge, or 00:32 at Wembley Park
Northern line – 00:05am at East Finchley or 00:18am at Morden
Piccadilly line – 00:30am at Acton Town, or 00:56am at Cockfosters
Victoria line – 00:02am at Brixton or 00:23 at Walthamstow Central"
OK, admittedly not much use if you wanted to actually go out on Christmas Day, but interesting considering the tube is considered closed on the 25th.