In 2021 we bid many things farewell: Philip Green’s retail empire, England’s Euro chances and Donald Trump’s presidency. And now, joining them on the ash heap of history, appears to be David Cameron’s short-lived career as a lobbyist, after months of damning revelations about his multi-million pound efforts for Greensill Capital. After the conclusion of the Brexit wars, the onetime Prime Minister might have harboured some hopes of a retrospective rehabilitation but the collapse of Greensill and the release of the Old Etonian’s accompanying cringe-worthy texts has put paid to that.