London bus drivers plan to strike over working conditions during periods of extreme heat, a dispute raised by Unite the union. According to reports, drivers are walking out after experiencing heat-related illnesses, including heat exhaustion, heat stroke and dehydration, amid very hot weather. The issue centers on how working conditions are managed for staff during high temperatures, with the union citing health impacts on drivers. The strike is described as a response to drivers’ reported symptoms during extreme heat and a demand for improved protections and working arrangements. Separate details on timing, duration, and specific demands are not provided in the supplied excerpts. Overall, the coverage is consistent that the action is driven by concerns about driver safety and wellbeing during hot weather and that Unite is the organizing body for the industrial action.