Supporters of Anonymous have also protested in Dublin and Belfast as the movement takes part in the global protest against corruption on Bonfire Night.
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Save Your Uber in London was set up after it was announced the firm would not have its licence renewed when it expires next week.
After a damp morning it will brighten up in the south and northeast but will remain cloudy in northwest England and southern Scotland.
Chinese leaders have imposed the sanctions after becoming increasingly frustrated with Kim Jong Un’s nuclear and missile tests.