jno, I am well aware that the Pandersheets are skewed.
I realise that 9 newspapers encompasses the press in their two day a week for 2 months press survey. Their data collection started on the 20th Feb and the official campaign started on 15th April, that alone is enough to skew results of pro- and anti- that were reported, and I doubt that the results of the less than 33% sample size is definitive given the possible variation in coverage from day to day.
The OP is about brainwashing, a subject that interests me more than some 'study' which may have had its result negated by subsequent, more current press coverage.
My view is that this Referendum will be decided on material considerations and the side that convinces a majority that you will lose less/gain more[£] will win.
There is no room for morality in this controlled narrative, the brainwashing was too effective to allow it.