I have had the berthing master confirm details and the visitors pontoons on the western side, as already stated, have 1m over CD. So that evening and the following morning, with a LW of ~1m it will be a bit shallow. However, the bottom is pretty soft so sinking in should not be a problem.
As a result of the discussion I am also now going to try to reserve some berths so we are in the deepest part.
Note also though that the river leading up to the Folly Inn is shallower so it would be wise to arrive by 5pm and not depart the following morning until after 9am.