Britain's Labour Party leader Jeremy Corbyn (L, front) attends a rally at the Parliament Square, calling for a general election, in London, Britain, on July 25, 2019. (Photo by Alberto Pezzali/Xinhua)

Britain's Labour Party leader Jeremy Corbyn speaks during a rally at the Parliament Square, calling for a general election, in London, Britain, on July 25, 2019. (Photo by Alberto Pezzali/Xinhua)

People gather at the Parliament Square as they attend a Labour Party rally calling for a general election, in London, Britain, on July 25, 2019. (Photo by Alberto Pezzali/Xinhua)

Britain's Labour Party leader Jeremy Corbyn attends a rally at the Parliament Square, calling for a general election, in London, Britain, on July 25, 2019. (Photo by Alberto Pezzali/Xinhua)