Visitors traveling around London could soon ride buses with better working conditions for the people behind the wheel. An agreement involving Mayor Sadiq Khan, Transport for London and the Unite union sets a May 2027 deadline for air conditioning across the capital’s bus driver cabs.

For passengers, there is an important distinction: the commitment covers the driver’s enclosed workspace. It does not mean every London bus will have air conditioning throughout its passenger seating areas.

The agreement follows industrial action and concerns about drivers working in excessive heat. Around 1,500 Arriva North London drivers took part in strikes in August, with the dispute affecting eight garages. Drivers reported that existing cooling systems provided insufficient relief during hot weather, while Unite raised concerns about fatigue and heat-related illness. The Guardian’s reporting on the dispute describes the conditions behind the walkouts.

Under the agreement described in the supplied report, cabs that fall below the required ventilation and air-conditioning standards will receive upgrades by 31 May 2027. The agreement also includes protective solar film to help limit drivers’ exposure to sunlight.

The measures extend beyond installing equipment. The report outlines tighter procedures for dealing with defective heating and cooling systems, including returning affected vehicles to the garage and repairing faults before putting them back into service. Unite is expected to monitor progress as the work proceeds.

An upgraded New Routemaster is also being tested in passenger service, the report says. Its revised ventilation and air-conditioning system has undergone laboratory assessment, with positive early feedback from drivers.

For people planning a London trip, the announcement is best understood as an improvement to the conditions in which bus drivers work. Better cab cooling is intended to ease the strain of driving in hot weather, but travelers should not assume a summer 2027 journey will include an air-conditioned passenger compartment.

The deadline now provides a clear target. Delivering the upgrades—and keeping the equipment working—will determine how much difference the agreement makes during future hot spells.