Sean Curran and the BBC's parliamentary team report as David Cameron and Ed Miliband face each other at their first question time. And Nick Clegg is questioned about voting reform.
At their first question time David Cameron and Ed Miliband clash over plans to remove child benefit from higher-rate taxpayers. Pees question Nick Clegg about his plans for a fixed-term parliament, changes to Commons' constituencies and the voting system. And the most senior civil servant at the Ministry of Defence faces MPs as they conduct an inquiry into the defence budget. Sean Curran and team report on today's events in Parliament.