I updated the coastline, the tidalflats and also added some saltmarsh and wet meadow/pasture areas further up stream. I also untangled the boundaries from River Kent in this area. 

I tagged the area's that seem to be transitioning from Tidalflat to saltmarsh as Saltmarsh already under the presumption that they will continue to develop. 

Feel free to edit any things you dont agree with, as you're more familiar with the area. 

https://www.openstreetmap.org/changeset/137575294

Sincerely,
Taya