GENEVA (Reuters) - A United Nations expert on Monday criticised Sri Lanka’s move to impeach its chief justice, saying it was part of a pattern of attacks on lawyers and a bid to stop judges carrying out their work independently of politicians. Parliament could vote next month to impeach Shirani Bandaranayake after she was found guilty by a parliamentary panel of financial irregularities and a failure to declare assets. The case risks a destabilising clash between President Mahinda Rajapaksa’s government and the judiciary. Opposition parties have withdrawn from the process, saying it was unfair. Gabriela Knaul, UN Special Rapporteur said the case against Bandaranayake was part of a pattern of attacks against members of the judiciary and lawyers and interference in their work.