I've just listened to BBC Radio 4's more or less programme, including interviews with anthony wells and martin boon, interview, the replay of which is now up here (starting at 5:20).
What I found really interesting (and refreshingly candid) was his admission that the pollsters might all have got this spectacularly wrong and actually mentioned 1992. He also seemed concerned about a patriotic ‘spiral of silence’ that causes ‘yes’ to be overstated.
It’s definitely worth a listen.