As a Freedom of Information request revealed that temperatures on the Mayor's "new Routemaster" buses can reach 34 degrees Celsius - above the legal limit even for transporting livestock - Caroline Pidgeon told the politics.co.uk website:
"Pretending that there is not a problem with the new bus for London is simply not an option for the Mayor and TfL.
"Transport for London's excuses for excessive heat levels on the incredibly expensive new 'Routemaster' buses are rather like the hot air that bus passengers have to endure.
"If there are faults with the air conditioning of even eight buses that is a significant problem in a relatively small bus fleet.
"However, the fundamental issue is that even when air conditioning is working temperature levels are still excessive."