
The incident began on Wednesday afternoon with reports at 3.26pm of heavy traffic on the A477's southbound carriageway near the Cleddau Bridge.
Offal was spilled onto the road from an articulated lorry, which was later confirmed to be nearer the Honeyborough roundabout. The spillage prompted warnings to motorists to proceed with caution.
By 5.18pm, the scene was described as "utter chaos" as congestion built up during the busy rush hour. The disruption lasted for several hours, with very heavy congestion in the area at 6.33pm. The situation gradually improved, with congestion finally easing by 7.07pm before clearing completely around half an hour later.