A pro-establishment lawmaker has suggested Beijing’s liaison office would be furious if a Legislative Council meeting on national anthem legislation were adjourned on Friday.Martin Liao Cheung-kong was chairing a meeting of the National Anthem Bill committee, when he was heard making the remarks in a personal conversation with his deputy Horace Cheung Kwok-kwan during a break when the pair did not know their microphones were still on.It came as Beijing’s representatives in Hong Kong flexed…