Following a meeting with the Afghan and Pakistani presidents in London, British Prime Minister David Cameron on Monday appealed to Taliban to take part in peace talks, dpa reported. "Now is the time for everyone to participate in a peaceful, political process in Afghanistan," he said. "This should lead to a future where all Afghans can participate peacefully in that country's political process." Cameron said Afghan President Hamid Karzai and Pakistani President Asif Ali Zardari had agreed an "an unprecedented level of co-operation" as well as the opening of an office in the Qatari capital Doha for negotiations between the Taliban and the Afghan High Peace Council.