Potholes are often created when the top layer of tarmac and the material beneath (often refewrred to as the base, or sub-base) can not support the weight of the traffic that passes over it.
This can be caused by wear and tear, bad weather conditions (of which we are having a lot of lately!), poor drainage, improper maintenance and substandard materials.
With the recent weather it's not a surprise to see potholes popping up everywhere, frustrating as they are!
Here's a repair on a pothole that we carried out recently at Walsh Junior School in Aldershot.