Hong Kong demonstrators are calling on the UK to voice stronger opposition against the controversial extradition that triggered mass protests and rare scenes of violence.

On the day after hundreds of thousands took to the streets to block parliament from debating the proposed laws, some protesters turned their ire to the city's former colonial rulers.

“Is Britain going to honour its promise to the Hong Kong people that our way of life will not be threatened after they handed us over to the Chinese?” Jessica Yeung, 50, a university professor on a hunger strike by the city’s main government building, told The Telegraph.

“Britain told us to trust them, so we trusted them,” she said, as rows of riot police watched a few metres away. But the UK “has let us down terribly”.

Protesters surrounded the Hong Kong parliament on Wednesday demanding city leaders scrap a plan to send individuals to face trial in mainland China’s murky legal system, where the ruling Communist Party controls the courts.