as three tube trains got stuck in a tunnel at Baker Street. It's no laughing matter though really as it is absolutely sweltering today. The Standard report:
There was panic as the trains became jammed near Baker Street when a set of points buckled in the heat. More trains were stuck in a knock-on effect.
Five ambulances were put on stand-by as distressed passengers rang the emergency services from the carriages. "It was chaos, people were in a real state," said one LU worker.
The ordeal, which lasted up to an hour, came as the temperature in London reached 31.1C - almost 90F - on what is the hottest day of the year so far."
Expect to see lots of station staff running around in very hot uniforms putting up signs about remembering to take bottles of water on the Tube with you.
In the meantime, I think the sun has gone to culture secretary Tessa Jowell's head as she reckons London definitely has the best transport infastructure to cope with the 2012 Olympics. Hmmm, has she travelled on the Tube recently?