Choosing a new British prime minister through the Conservative Party's election process is "unacceptable," meaning a general election should take place as "the only democratic way forward," Britain's sole Green Party lawmaker said on Monday.
"Andrea Leadsom's decision to pull out of the [Conservative] leadership race underlines the necessity of a general election this year, something the Greens have called for since the EU referendum result was announced," Caroline Lucas said.
"It is unacceptable that the next person to hold the top job in British politics is appointed by 60 per cent of Tory MPs (members of parliament)," Lucas said in a statement.
"They have no mandate to renegotiate Britain's place in the world in this post-referendum period," Lucas said. "A general election is the only democratic way forward."
She said Leadsom was "the latest in a long line of prominent Vote Leave campaigners to walk away from the almighty mess they have helped to create" after they were "seemingly prepared to say pretty much anything to claim a referendum 'win'."
The Green Party won 5 per cent of the votes in a general election in May 2015, but gained just one of the 650 seats in parliament under Britain's constituency-based, first-past-the-post system. It favours proportional representation in elections.