Most likely excuse is that they saw baitdiggers out there and assumed it was OK for birdwatchers/photographers to go out there.
It's not impossible they had some specific reason for being out there. Photographically I would have thought trying to stalk birds on the Humber mudflats was a waste of time - they'll be off long before you get near them.
On my last visit to Spurn I noticed that the barbed wire fence and the sign next to the hide had been flattened. I had assumed it was baitdiggers showing what they thought but perhaps not (I'm referring to the smaller northern hide).
It's not impossible they had some specific reason for being out there. Photographically I would have thought trying to stalk birds on the Humber mudflats was a waste of time - they'll be off long before you get near them.
On my last visit to Spurn I noticed that the barbed wire fence and the sign next to the hide had been flattened. I had assumed it was baitdiggers showing what they thought but perhaps not (I'm referring to the smaller northern hide).