AS BRITAIN wilted in the heat today,  the TUC said that working temperatures must be capped by the next government.

It is calling for a change in the law so that employers must attempt to reduce temperatures if they get above 24°C and workers feel uncomfortable. 

The union body would also like ministers to introduce a new absolute maximum indoor temperature, set at 30°C — or 27°C for those doing strenuous jobs such as warehouse packing — to indicate when work must stop.