Overview: Today, we look at the Conservative manifesto launch as Rishi Suank promises a further cut in National Insurance. Unveiling the party’s plans from Silverstone race track, the PM said he would "scrap entirely the main rate of self-employed National Insurance” and that the Conservatives would "keep cutting taxes in the coming years”. Does this all add up? Adam and Chris are joined by BBC Economics Editor Faisal Islam and Newsnight Political Editor Nick Watt.