Insurance firm Allianz has hit out at inconsistent definitions of potholes. According to the company’s research, while some councils consider a defect 20mm deep a pothole, others require it to be at least 50mm deep. Similarly, some councils require a minimum width of 300mm to qualify a pothole, compared to 150mm in other regions. Allianz figures also show pothole claims are costing 55% more than five years ago, at a staggering £4000 per claim.