Success, another 600 Avios questionnaire finally came through and I qualified. It seemed to have opened the logjam. Several more @25 Avios, and they take the five minutes as promised. Also invited to a medical study and matched with a doctor. Now, as I'm using them to keep my account open, I wonder if I can wait until September to try the next one and not be forgotten.

And MileageAddict, I must again compliment you as I did in the other thread. You must have qualified for and had the time for ~ 25 of these surveys plus the ones that you spent time on and didn't qualify for. This plus the others that you promote must mean that you don't do much besides this sort of thing. Whew.