of-Spain, Nov 28, SPA --Prime Minister Gordon Brown today announced that Britain would host and international conference on January 28 on the withdrawal of international troops from Afghanistan, according to dpa. Brown said Afghan President Hamid Karzai would be given benchmarks for boosting the capacity of his country"s army and police and improving local government to pave the way for a withdrawal of the NATO-led International Security Assistance Force. Brown made the announcement with UN Secretary General Ban Ki-moon on the sidelines of the Commonwealth Summit being held in Trinidad and Tobago. Ban said another meeting in the Afghan capital Kabul would follow the London conference.