UK Mud locations

Hi all, thought I'd start a thread about places that have some nice mud for rolling about in now that summer is here
I'll start with some Scottish favourites; Forth estuary between Grangemouth and Stirling and Solway firth from Gretna to Dalbeattie. Where are your likely looking places?
I'll start with some Scottish favourites; Forth estuary between Grangemouth and Stirling and Solway firth from Gretna to Dalbeattie. Where are your likely looking places?
