Cheltenham Festival: Day 2 preview

John Inverdale, correspondent Cornelius Lysaght, commentator John Hunt, retired jockey and pundit Andrew Thornton and current jockey Lizzie Kelly look ahead Wednesday's races. Can the favourite Altior defend his crown in the Queen Mother Champion Chase? Plus Lizzie talks us through her chances in the Glenfarclas Chase and the team look ahead to the Champion Bumper.