The Liberal Democrats' home affairs spokesman, Chris Huhne, is among the panelists on BBC1's Question Time tomorrow. He explains why he'll join the debate with Nick Griffin, leader of the far right British National party.
Jon Boone reports from Kabul on Hamid Karzai's decision to accept that a second round of elections is necessary in Afghanistan.
Julian Glover looks at the latest Guardian/ICM poll, which shows the Conservatives maintaining a 17-point lead over Labour.
Health editor Sarah Boseley reports from an Aids vaccine conference in Paris, where doubts have been cast on a serum that was recently hailed as a breakthrough.
Luke Harding reports from northern Siberia on the effects of global warming.
