We have the third in our series of extraordinary films on the 7/7 terror attacks in London, in which people caught up in the bombings recount how the attacks unfolded and changed their lives forever. If you missed Wednesday's film on the Edgware Road attack you can watch it here. Newsnight has an exclusive interview with a former colleague of the 7/7 bombers' leader, Mohammed Sidique Khan, which sheds new light on the crucial years before the bombings when he was living in Leeds. We'll also be examining the legality of the US operation that killed al-Qaeda head Osama Bin Laden in Pakistan. Could Britain have undertaken something similar? And voters across the UK are going to the polls in a series of national and local elections as well as a referendum to decide the way MPs are elected. We'll have a report from Scotland on the elections for the parliament and Michael Crick will take a look at the alternative vote referendum.