Political columnist Michael White assesses the result of yesterday's byelection in Crewe & Nantwich, and what it means for Gordon Brown and David Cameron.
Economics editor Larry Elliott explains why oil prices have hit record highs.
Diplomatic editor Julian Borger looks at a new offer from Iran to the UN security council that may assuage fears about Tehran's nuclear programme.
Parents face a postcode lottery if they want to appeal against decision to reject their child from the school of their choice. The schools minister, Jim Knight, discusses the appeals process with education editor Polly Curtis.
As Birmingham social services chiefs discuss the circumstances surrounding the death of seven-year-old Khyra Ishaq, David Batty outlines the questions raised by the tragedy.
And theremin virtuoso Pamelia Kurstin plays the unusual musical instrument for the Guardian's Pascal Wyse, who tells me how difficult it is to play.
