I don't think it should be unexpected that if you own land on a flood plain, sometimes it will be flooded.

It is known that dredging is not the magical solution, in many cases it is utterly pointless, what are they going to do, spend millions of pounds dredging every two or three years.

More trees in the uplands and farming methods that don't impact the soil would help, there should not be water lying in fields for days after heavy rain.