Boris Johnson said he backed the people of Hong Kong and cautioned China that one country, two systems should not be cast aside.
Boris Johnson could be Britain’s prime minister by the end of the month.
Britain has repeatedly pressed China to honor its commitment to protect human rights and freedom in Hong Kong.
Hong Kong has been rocked by the largest protests.
Police fired tear gas to disperse the protesters and arrested hundreds of them.
Johnson said, the people of Hong Kong are perfectly within their rights to be very skeptical, very anxious about proposals for extradition to the mainland that could be politically motivated.
He said, “I do support them and I will happily speak up for them.”
Hundreds of protesters in Hong Kong broke into the legislature after a demonstration marking the anniversary of its 1997 return to Chinese rule.