We all have to have a go its our duty

Just the maps on crown foreshore site are not very good as far as boundary's go.
I have tried to cross reference it with OS maps but still would like a bit of advice on the matter.
Can anyone tell me the NO go zones and where this starts and ends ?
Also what part of the beach can I detect and what part id NO go ?
Here is a bit of a map from the north east map supplied by crown foreshore..
As you can see its a bit vague at the least.
Any advice or help appreciated.
Thanks Steve
