If you're wondering why the tube trains are so hot and what TfL is trying to do to cool them down...
Cooling the tube – Engineering heat out of the Underground
https://t.co/yQciGjr7GK
"The first 90% of the code accounts for the first 90% of the development time. The remaining 10% of the code accounts for the other 90% of the development time." - Tom Cargill