Welcome to Whitehall Sources where we take you behind the scenes at Number 10 Downing Street. This week: what do we know so far about the plans Rishi Sunak and Jeremy Hunt have for the economy? We discuss "test balloons" (also known as kite-flying) and why this strategy is effective. In Chequers and Balances - where we speak to an opposition adviser - we hear from James Meadway who advised John McDonnell who was Shadow Chancellor for Labour while Jeremy Corbyn was leader. He explains the ins and outs of Rishi Sunak's favourite attack against Sir Keir Starmer: that he supported Jeremy Corbyn. Plus, we open the doors (complete with sound effects) to The Correspondence Unit - this week, you wanted to consider Suella Braverman and immigration: does the Home Secretary speak for you on immigration policy? Also - Calum makes inappropriate jokes about Matt Hancock going on I'm a Celebrity, Get Me Out of Here; Kirsty has a laughing fit and Oscar tries to make a serious point in the midst of it. We LOVE to get your analysis of what we've said, plus your questions about how things work in Whitehall. You can email us anytime: hello@whitehallsources.com.