By Emma Revell In economics, the “animal spirits” of human emotion matter. So why is Labour determined to talk Britain down, asks Emma Revell One of Liz Truss’ biggest mistakes, in an admittedly crowded field, was seeking to introduce frankly enormous shifts in tax policy without any warning or planning, in a ‘mini Budget’ which was unleashed on markets two years ago yesterday. The work had simply not been done in advance of her fiscal event to bring key stakeholders into the loop and ensure they were happy that the plan was workable before it was announced. Chancellors like to leave something…