River Roach. Those saltings seldom cover.Looks like Wrabness
There is a lovely anecdote in 'The Magic of the Swatchways', though it is may years since I read it. Maurice Griffiths found himself aground in Alresford Creek (I think) with the prospect of not getting off on the next tide. A couple of old boys were nearby and one was was heard to say something like "Wunnerful high tide there were last night. Don't reck'n there'll be one like it for many a month", clearly implying that they were prepared to assist, for a substantial fee. Griffiths then set about the processs of digging and kedging to prove them wrong and avoid having to fork out, taking much of the day about it. Like all his stories, he wins in the end.