The prime minister once supported the idea of impeaching Tony Blair over the Iraq war. Now Plaid Cymru are urging other parties to consider the unusual move.
Boris Johnson impeachment: PM could be removed under arcane law if he ignores bill blocking no-deal Brexit, party leader says 09/09/2019
Opposition parties told to prepare to use obscure device to oust prime minister if he ignores parliament.
Opposition day debate picked for motion backed by SNP, Lib Dems, Greens and a Tory MP.