Overcrowding at one of Scotland’s busiest emergency departments created a fire safety risk, watchdogs have warned.

Healthcare Improvement Scotland (HIS) said it was “not assured” of fire safety at the Royal Infirmary of Edinburgh A&E department which at times operates at 300% of its capacity.

The watchdog found “multiple systemic failures” over two visits to the A&E.

NHS Lothian said a major improvement drive was already under way.

The health board said redesign work to improve patient safety and flow through the hospital would improve its performance.

The unannounced HIS inspection of the Royal Infirmary of Edinburgh took place in February when the hospital was operating at more than 100% capacity and facing the peak of its winter pressures.