Our survey. Almost one in four Tory members want May to resign now. And over two in three want her gone before the next election.

Last month, the findings were:

Yes, now: 13 per cent.

Yes, before 2022: 50 per cent.

No: 34 per cent.

Don’t know: 2 per cent.

So the proportion of our panel respondents wanting the Prime Minister to resign as party leader now has risen by ten per cent in a month. And the proportion not wishing her to quit at all is down from just over a third to a bit over a quarter.

Here again is the combined total of those believing that Theresa May should stand down as Party leader either now or before the next election – for each month since last summer’s general election.

69 per cent (April)

63 per cent (March)

55 per cent (February)

71 per cent (January)

59 per cent (December).

62 per cent (November).

64 per cent (October).

65 per cent (September).

61 per cent (August).

62 per cent (July).

71 per cent (June).

What has clearly happens is that this figure stood at seven out of ten party members last June, in the immediate aftermath of the calamitous general election campaign. It peaked again in January in the wake of the bungled Cabinet reshuffle.

Now it is at its third highest rating on record. The only credible explanation is that May’s policy of delay over the Brexit negotiation is damaging her position, and further procrastination is likely to do so even further.

Her best rating came in February in the aftermath of her impressive handling of the Salisbury attack. The only other time it has dipped below 60 per cent was in December, in the wake of that month’s draft agreement with the EU (the “joint report”).

So each monthly answer to this question since the general election has found that over half the respondents want a new Party leader in place to contest the next election. This is not a stable platform for a premiership.