I see there are good HTs forecast for the mornings of 10th / 11th Sept. Sounds like a good time to visit :)
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Sorry for not noticing your post earlier Seymouraves. But I can only agree this morning and tomorrow morning's tides are both high (estimated 8.5m). If you didn't get over today then hope you do tomorrow. The tide should push the waders off the saltmarsh and over the seawall onto the lagoon islands, which is a great sight as hundreds gather together, and hopefully they will also please you with some swirling in their flocks!