How Hot Is The Tube?

Two more facts for your Central line video! 1) Central line trains run on a slick of magma. 2) Between Holborn and Tottenham Court Road, you might think you've seen the British Museum ghost station - but it's not! It's actually where Hell used to be situated, before Satan moved out because it was too hot.

To be fair to the tube, it's bloody hot everywhere else too

I am looking forward to ‘how cold is the tube?’ In 6 months

For next time: Could also measure humidity somehow, too, makes an enormous difference to how it feels

Can we just appreciate how he's giving everyone water

Interesting video Geoff. I actually work on the Underground and some of the temps in rooms, track and areas behind-the-scenes are much hotter than this. You've inspired me to buy a thermometer and see the various temps I can record when I'm out and about.

So nice of you to give out free water!!

He is like the London Underground version of Casey Neistat.

How ironic, when the British built us the MTR in Hong Kong, they have installed air-con in every trains and stations since day one. But the British themselves don't have air-con on their tubes until today😅😅

I always carry 2 small bottles of cold water...an ice pack in a 'cooler bag' helps throughout the day!

Haha love the Aussie! She'd know about heat, here in Aus during the summer's we often reach low 40s and one or two days per summer we reach 45'C. But our trains (in Sydney anyway) are air conditioned.

What a nice human being the fact that he was giving out free water to people on a hot day inspires me MR MARSHALL RESPECT FOR YOU SIR !!!💗👌👍👏

I'm positively surprised to be watching this before the "It's always 50°C where I live, what are you complaining about?" comments start rolling in...

The thing with air conditioning though... it heats up the tunnels and stations. Was in Barcelona last summer where the trains felt almost arctic inside, while the stations were unbearably hot.

You should have gone to the overground parts of the not-air conditioned liens, where the sun directly heats up the air in the train.

At 8:08 we can here the fact that the London Underground should look into regenerative breaking for their trains. This means that the train dumps it's kinetic energy back into the third rail instead of dumping the energy into break pads or more often into resistor banks on the train itself. Another advantage of regenerative breaking is that it also reduces the power demand of the train network as a whole as the overall power efficiency has increased. Another thing one can do is drive heatpipes into the surrounding rock to provide a larger thermal mass for heat to sink into. And during winter one can use said thermal mass to keep the tube a bit warmer. (or even draw in extra cold air to preemptively cool the tunnel for summer season, people after all wear winter clothing so won't really mind if the tube is 5-10 C during winter.)

Good to see Andy and Geoff reuniting for another video - you two make brilliant videos!

Yes, although I miss the A, C and D Stock, those S Stock trains really come into their own on hot days in the summer, with their powerful air-conditioning!! For a stark comparison, try changing from a District or H&C train to a Central Line one at Mile End on a hot day!

Lets Make a petition to the government and TFL to rename Cross rail/Elizabeth line to Cross Elizabeth Purple rail.

I just got back from a week in London,and must say that i ADMIRE you guys spending all that time in that heat on the tube. I found myself getting off the trains one station earlier just to get out in the open air...