I tried here again today, a quite chilly and dull day. It was lovely and sheltered, and still like glass, with only two other people there. It is a nightmare to get to, going down some very narrow scary Devon lanes, which is enough to put me off to be honest.
Add to the that, both times I have not had even a slight wobble on the float for hours at a time. Nothing. Maybe they do not like boilies. Who knows. I probably will not ever find out.