For the first time in a British general election, the leaders of the three largest UK parties are taking part in televised debates. Radio 4 will broadcast the whole of tonight's second debate, on international affairs, hosted by Sky live from 8pm. Robin Lustig will be in London with a panel of political watchers to look ahead to the issues being discussed, and afterwards from 9.30pm to consider how the leaders tackled them. Ritula Shah will be in Reading with first-time voters, who will be giving their reaction to the debate. Show less