Boris Johnson was once likened by a member of his party to a "greased piglet" for his ability to bounce back from a succession of setbacks and scandals that would have sunk other less popular politicians.

However, his luck has continued to fade as COVID-era party scandals forced him to quit as a member of parliament less than a year after they helped push him out of office as prime minister.

The 58-year-old populist angrily quit as MP in the midst of an investigation into whether he repeatedly lied to parliament over lockdown-breaking parties when he was in office, which he slammed as a "kangaroo court."