Reparations have resumed at the Notre Dame Cathedral in Paris.

Workers are gradually returning to clear out hazardous debris and consolidate the fire-damaged medieval monument after a month-long delay prompted by fears of lead contamination.

Strict new lead-protection measures for workers include disposable clothing and a new decontamination zone to ensure their activities don’t generate any pollution outside the site.

The consolidation work is a crucial first step to ready the fragile cathedral for reconstruction.

Hundreds of tons of lead melted in the April fire, spewing toxic dust into the air.