26 April 2021 • 7:43pm Simon Case, the head of the Civil Service, was questioned by MPs Credit: House of Commons/PA Wire If nothing else, the latest Dominic Cummings saga will be of huge value to aspiring MPs. The most important lesson any politician needs to learn is how to answer – or, better still, not answer – awkward questions. And today (Monday), they were treated to fascinating demonstrations of three very different techniques. The first came from Boris Johnson. At a factory in Wales, the Prime Minister was asked about the startling allegations made by his former adviser. In re...