The amendment calling for elections is signed by Tory awkward squaddies Christopher Chope, David Nuttall, Edward Leigh, Peter Bone and Jacob Rees-Mogg, plus heavyweight ex-ministers David Davis and John Redwood and 1922 Committee grandees Graham Brady and Charles Walker.
Centre Mike Tindall and flanker Tom Rees are certain to miss the remaining Six Nations fixtures, while David Strettle is recovering from a serious foot injury and influential prop Andrew Sheridan also missed the trip to Rome because of an infection.