What the Tories were elected on was the same stance the PM took during her Mansion House speech, this is also the ERG's clear position.
It is no longer in the hands of the PM or the ERG. There is no majority for her type of deal, and no majority for a no deal. She has talked herself into a corner and no one should believe her red lines anymore. The only thing that does seem to have majority support outside of Westminster is to put whatever comes out back to the people.