Posted: 08/03/2017 at 15:31
If your roof water is running down into the garden and not into a soak away, that would cause waterlogging, especially after all of the wet weather which has been prevalent in the last few years. also, the development in the area, on farm land is another, you really do have a problem as your garden looks as if rubble has been used with gay abandonment. Under ground waterways and springs will find their own route as the extensive flooding throughout the country has shown recently. I am also wondering if the rubble from the outside toilet etc. has been buried to get rid of it.
I had no idea there was solidified shale under my garden until I had the conservatory built. They tried digging a soak away but had to bring in a mini digger to get through it.
Would it be worth looking for old maps to see where springs and streams used to be and look into having a soak away put into your garden somewhere.
Not many plants will enjoy growing with their roots in water