UK Heatwave: What's the legal temperature for work?

Scorching heatwave conditions have returned to the UK, with temperatures predicted to reach up to 39C in some areas this week. This extreme weather prompts questions about workplace safety and employee rights during hot conditions.

While the UK lacks a specific legal maximum temperature for indoor workplaces, employers are legally obliged to provide a safe and healthy working environment. This includes ensuring that indoor temperatures are 'reasonable,' a term that varies depending on the nature of the workplace, such as an office, bakery, or warehouse.

The Trades Union Congress is campaigning to make it illegal to keep people working indoors if temperatures exceed 30C. They also advocate for protections for outdoor workers and drivers. Employers must conduct risk assessments and implement necessary control measures if a significant number of employees complain about thermal discomfort.

Key factors considered in determining a reasonable temperature include air temperature, radiant temperature, air velocity, humidity, and the clothing employees are expected to wear. The Health and Safety Executive emphasizes that a single maximum figure is difficult to establish due to varying workplace environments.