Prime Minister Abhisit Vejjajiva went to work briefly at Government House on Wednesday as the ring of demonstrators camped outside the grounds vowed to continue their campaign to unseat his two-month-old government. Up to 10,000 supporters of ousted prime minister Thaksin Shinawatra dressed in their trademark red shirts surrounded the Government House compound in Bangkok on Tuesday demanding fresh elections, with many sleeping outside overnight. Protest leaders have vowed to stay as long as they have to, piling pressure on the young government just days ahead of the key regional Association of Southeast Asian Nations (Asean) summit, which has already been delayed.