Unless someone corrects me, I understand the Burnham Deepdale issue is a double-edged sword of hunting and privatism. The fields inland of the seawall west of the Burnham Norton marshes (ie from Deepdale eastwards, check it out on Google earth) have been developed into marshland with the primary aim of shooting wildfowl, snipe, partridges, hares etc. The landowners are very defensive of anyone looking at their land, but a few local birders do watch the area (though I've no idea if they are granted access into the habitat) and they embrace privatism. Pretty much the whole area can be seen (with effort) from the seawall and/or the A.149, although some of the habitat is screened and/or distant. I don't know if the Terek was feeding on, or just roosting on, the freshmarsh fields. Of course, all of the harbour creeks are public access, and it seems highly likely that the Terek might have visited the saltmarshes during at least some low tides. The trouble is, few if any other birders ever visit the site, so BD joins the many sites around Norfolk that we cannot expect to hear much from on the day...