Five hundred HMRC workers in Preston were sent home yesterday, due to unsuitable working conditions.
The staff, who work over different floors at the Guild Centre in Lord’s Walk, were allowed to go home on full pay, because of a heating breakdown.
Lynne Wallace, branch secretary of Preston’s Public and Commercial Services Union, which represents the workers, said the action was not a form of industrial action.
She said: “There has been long, ongoing issues with the heating in the Guild Centre, that have not been resolved.
“The temperature affects the productivity of the workers and ultimately, the service that customers receive.
“Staff have not just upped and gone home, this has been considered.”
CBRE which manages the centre was unavailable for comment.