Pakistani President Asif Ali Zardari and Afghan President Hamid Karzai are due in London to attend a tripartite summit between Pakistan, Afghanistan and Britain with British Prime Minister David Cameron (February 3-4). During the talks the leaders of Pakistan and Afghanistan will outline their Strategic Partnership and evolve joint strategy for reconciliation in Afghanistan for establishment of administration that should ensure stability in the war-torn country in the wake of the withdrawal of the foreign troops. It will be third trilateral summit of Pakistan-UK and Afghanistan in less than six months.