Ben Wallace is among the list of Tories tipped to take over from beleaguered current Prime Minister Boris Johnson.
The Defence Secretary has received some praise for his work with Ukraine since Vladimir Putin's barbaric invasion, arguably raising the importance of the role since war broke out as Britain supplies the Ukrainian army with weapons.
The PM has has a tumultuous few months of his own making and may now face a few more worried Conservative members and MPs after losing the by-elections in Wakefield (to Labour) and Tiverton and Honiton (to the Liberal Democrats).