On Monday March 3rd the House of Commons echoed with glutinous praise. Sir Keir Starmer was updating Parliament after a week of shuttle diplomacy. What began with the prime minister glad-handing Donald Trump in the Oval Office, before hosting a “coalition of the willing” of European leaders in London, ended with Sir Keir trying to mend the relationship between Volodymyr Zelensky, the Ukrainian president, and Mr Trump.