I had my back door along with a wall that had a window above it removed and replaced with a UPCV window quite a few years ago.
There is a piece of wood on the floor in front of the door/window that covers up where the brickwork used to be.
When lifted it is possible to see down into the cavity that the wall used to seal up along with the cavity below my floor at the rear of the house.
I noticed a bad smell and upon lifting the piece of wood noticed about an inch or two of water visible at the lower points (there is a little mud at the bottom of the cavity) at a depth of just over 2 feet below the floor level. Is this normal to have so much water there?
What can be done about the smell?
Should I be worried about anything else?