It is hard to believe that No Deal is a more popular option than, say, a Canada-style deal – the previous favourite of the survey panel’s policy choices.

What seems to be happening is that as the probability of No Deal increases, so does its support. Last month, it stood at 34 per cent, along with the Canada option.  This month, it rises to 44 per cent and Canada falls back to 26 per cent.

There isn’t much movement elsewhere.  Backing for Theresa May’s deal rises from 14 per cent to 16 per cent, but this is well within any margin of error.