It has to be faced that Cummings and Johnson have now in all probability weathered the worst of this storm. They have put up two fingers to all the public outrage and with only forty conservative MPs declaring that they believe that Cummings should resign that still leaves Johnson a majority of forty in the House of Commons should a vote of no confidence be called by the opposition.
Johnson has realised that even with all the public hostility over what Dominic Cummings carried out, that outrage has had no centre of opposition and as long as that situation continued there was no real challenge to his leadership or his decisions on the future of Cummings.
As any experienced grassroots trade unionist will tell anyone, any campaign has to be well organised and well targeted toward its objectives. In that, there has been enormous demonstrated hostility towards Cummings in a desire to see him removed from his position. However, that enormous hostility has had no central leadership and in that has always been doomed to failure.
I have stated several times on this forum that the above leadership could only come from the opposition parties in the House of Commons, and in that (with the exception of the SNP) they simply have not "turned up" to lead all the outrage of those posting continuously on social media etc.
Within a week schools and retail will be open once again and the national Covid debate will turn to the problems of those changes. That will leave Dominic Cummings believing he is titanium man, and perhaps in that belief, he may just be correct unless something new and very unexpected is brought into this issue.