The most incongruous and frustrating aspect of the serious political crisis in which Boris Johnson and his party are now mired is the uniformly petty character of the original transgressions that provoked it. A Christmas party (now parties) that almost certainly breached the severe anti-Covid rules then in place, a row over wallpaper in the Prime Minister’s flat – shorn of their political context and the toxic cover-up attempts, such controversies are the stuff of suburban feuds.