The remarkable answer to the question, ‘how deep does a pothole need to be in Surrey?’ depends on the depth of the road surface. At the Woking Borough Council Overview and Scrutiny committee meeting on 14^th September I learnt that most Surrey roads have a surface above the base of the road of about 35mm. If a pothole does not reach this depth it is not considered deep enough to urgently need repair. Once a pothole reaches 40mm and has therefore breached the base of the road it is considered a safety concern. There is also a financial aspect to this, as the surface of a road is much cheaper to repair than the actual base of the road. Once the base of the road is damaged the cost to actually repair the base of the road is significantly above the cost of simply resurfacing the road.  This is useful to know and explains why some potholes seem to be filled sooner than others. With so many potholes in Surrey, it does not surprise me that they have to prioritise, but leaves me wondering if the problems with Surrey roads are going to get better anytime soon?