Conservative lawmaker and Britain's 'anti-corruption champion' John Penrose announced on Monday that he resigned from his role, as reported by Reuters.

"I’m sorry to have to resign as the PM’s Anti-Corruption Tsar but, after his reply last week about the Ministerial Code, it’s pretty clear he has broken it," Penrose stated on Twitter. "That’s a resigning matter for me, and it should be for the PM too."

Latest from lawmakers on the upcoming confidence vote

• UK Foreign Minister Truss says she backs PM Johnson in the confidence vote.
• UK Finance Minister Sunak says he backs PM Johnson in the confidence vote.
• UK's Gove says he backs PM Johnson in the confidence vote.
• Former UK Foreign Minister Jeremy Hunt says he will be voting for a change at the confidence vote in PM Johnson.

Market reaction

These headlines don't seem to be having a significant impact on the British pound's performance against its rivals. As of writing, the GBP/USD pair was up 0.5% on the day at 1.2550.