London is experiencing a hot bank holiday weekend, with temperatures potentially reaching 33°C. Unfortunately, traveling on the Tube will be more uncomfortable than usual, as most lines lack air conditioning.
Which Tube Lines Have Air Conditioning?
Only a handful of London Underground lines currently benefit from air conditioning. These include the Circle, Hammersmith & City, District, and Metropolitan lines. Additionally, the Overground, Trams, and Elizabeth line also feature cooling technology.
Which Lines Lack Air Conditioning?
The following lines do not have air conditioning: Central, Bakerloo, Jubilee, Victoria, Piccadilly, Waterloo & City, and Northern. Passengers on these routes often endure sweltering conditions during summer.
Why Isn't Air Conditioning on All Lines?
The lack of air conditioning on many Tube lines is primarily due to the age of the infrastructure. The earliest tunnels date back to the 1800s, leaving insufficient space for installation. Engineers attempted a solution in 1934 by equipping a Northern line carriage with Frigidaire technology, but the trial failed.
Another challenge is that air conditioning units vent hot air, which could increase platform temperatures. Building new ventilation shafts for deep lines is extremely costly, according to Engineering and Technology.
Future Improvements
Air conditioning is coming to more lines. The Piccadilly line will benefit from a £2.9 billion upgrade, with new trains expected by the end of 2025. TfL is also seeking government funding for new Bakerloo line trains by 2030, which would include air conditioning. The Central line has received solar reflective material on roofs and solar reducing films on windows to reduce heat.
TfL advises carrying a fan and water bottle during hot weather. Sign up for the London Underground newsletter for travel updates and Tube trivia.
