By Sinn Féin President Gerry Adams (for the Guardian)
This week the British and Irish governments and all the main parties in the north of Ireland will be in Leeds Castle in Kent. Sinn Féin will be trying to unblock the political impasse here. It will not be easy. There are major issues to be crunched: around the need for all parties to participate fully in the political institutions; policing and justice, and especially agreement by unionists on the transfer of power on policing to the executive and assembly within a specific timeframe; and the issue of armed groups and of arms, human rights, equality and sectarianism.