It's hot, we get it, and everyone's asking the same question: "How hot does it really have to be before we can go home?"

Don't get excited though, because legally there isn't much justification.

The Health and Safety Executive’s guidance has previously defined thermal comfort in the workplace as: "An acceptable zone of thermal comfort roughly between 13°C (56°F) and 30°C (86°F)."

The temperature in workrooms should normally be at least 16°C, or 13°C if the work is manual labour, but there is no upper limit.

Although there is no set maximum temperature for when it is too hot to work, the law states that employers must provide a “reasonable” temperature.

Workers are advised to tell their employer if the workplace temperature is not comfortable.

HSE guidance also states that your employer may need to consider carrying out a "thermal comfort risk assessment" if a significant number of people complain of being too hot.

Today, the UK Trades Union Congress is calling for employers to temporarily relax their dress codes so staff can breeze through the heatwave.

Employers can still demand their staff to dress in a particular way, no matter the weather or the temperature, as uniform or clothing expectations are often included in a contract of employment but the TUC are advising employers to allow staff to adopt less formal attire.

They also recommend that fans be distributed, and staff be provided with a ready supply of cool drinks.

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Where people are working outdoors, employers should consider reviewing working times so that, where possible, work is done in the morning and afternoon, rather than around midday when temperatures are highest, they say.

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