DUBAI (Reuters) - British hostage Kenneth Bigley, kidnapped 10 days ago by gunmen in Iraq, is still alive, a London-based Muslim activist who has good contacts with Islamist groups in Iraq said on Sunday. Yasser al-Serri, director of the Islamic Observation Center, said his group issued an appeal to Bigley's kidnappers through mediators in Iraq and received a reply that the Briton was still alive. The British engineer is being held by Tawhid and Jihad, a group led by al Qaeda ally Abu Musab al-Zarqawi. It beheaded two Americans seized along with the Briton when its demand to have female...