Erg
The DUP and Tory backbenchers are now poring over the details of Windsor Framework.
Boris Johnson tells 1922 committee that Brexit negotiations are like climbing Everest: "We're at the Hillary Step - you can see the summit but it's shrouded in cloud."
Brexiteer MPs are reportedly plotting to oust the prime minister.
But ERG leader says MPs 'entitled' to want leadership challenge.