Parts of London's Tube network will have air conditioned trains from 2010, London Underground announced today.
Air conditioning systems will be installed first on surface line trains, including the Circle, District and Metropolitan lines.
Installing air con systems across the entire network, especially on the deep level lines such as the Piccadilly and Northern lines, has posed a challenge for many years.
A scheme that uses water to cool tube tunnels and platforms at Victoria Tube station is being repeated this summer following success over the past couple of years.
According to London Underground Managing Director Tim O'Toole cooling the Tube presents "a major and long-term engineering challenge".
"The London Underground's Victorian heritage is its charm and its burden," he told the BBC.
This summer about 40 industrial-sized fans will be installed at stations including Charing Cross, Bond Street and Bank.
By staff writer
