Thanks for all the replies positive and negative, to answer some questions I was wearing a helmet, I was watching out for potholes and wasn't zooming through the water and holes carelessly.
The one I hit was on a regular route and partially hidden due to a rain puddle, I passed the bulk of the puddle in the middle of the road about 2inches into the edge of the water and that was the problem having gone back today the hole is around 6-9 inches deep and you can just see the white paint where they are planning to repair it at some point. TBH I didn't expect a hole to be that close to the edge.
In this picture the pothole is the closest one, not the large flood, and I was in the middle of the road mindful of the road conditions well away from the edges and perceived hazards.
The next is a close-up of the hole and the white paint.