A rude poster descends behind you

An Idiot's Guide on what you should do

Every so often you see an object lesson of what not do to in a situation delivered by someone who really ought to know better.

So, on Tuesday in the public hall in Beccles in Suffolk the former prime minister, Liz of the 44 Days, was promoting her new book Ten Years to Save the West. Truss, who couldn't save her safe seat five weeks earlier, was telling…