Kris Webb was there and after we had decided enough was enough (it retreated into the trees and wasn't seen again for 30 mins) We decided to have a bit of a trawl around elsewhere, ending up viewing the flooded fields East of Melverley with the permission of a farmer. Despite trees and hedges hiding a significant number of birds, minimum estimates from here (scope essential!!): c200 Pintail, c250 Wigeon and c400 Common Teal, 3 Shoveler, there were a good number of Canada / Greylag Geese and Kris picked out a Dark-bellied Brent Goose amongst them.
Now this is what I call a record shot!
See that black smudge just right of centre - Brent Goose - honest!
Who knows what else could be lurking in this general area?
Despite checking out a couple more nearby lanes and meeting more friendly farmers no Whoopers seen.
The Green-winged Teal was still skulking in the trees at 3.50 when we returned there. No, I didn't get the camera out this time!
Kris will no doubt have the story to tell at http://scillyspider.blogspot.co.uk/