This is the fourth month running that Jacob Rees-Mogg has led the survey.  The month before last, he was on 21 per cent; last month, on 19 per cent. This month, on 20 per cent.

Michael Gove’s corresponding figures are 16 per cent, 17 per cent – and now 20 per cent.  The upward tick is not a very big one – but enough for him nearly to have nudged Rees-Mogg off the top of the tree.

The survey went out as Sajid Javid replaced Amber Rudd, and he has bounced up to become the only other person polled who gets into double figures – just: he gets ten per cent of the vote.  Whether his progress is sustained remains to be seen.

The full figures are below. Please note that, as ever since the last election, “Other” gets a big showing – indeed, it is ahead of the Home Secretary on these figures.