<p>Divisive, controversial, atypical - few others embody the fraught nature of British politics today quite like John Bercow. A man who is revered by his one-time political opponents and chastised by his former bedfellows. A politician who has traversed the deep chasm between the Conservative right and the liberal left. A Speaker some see as a great moderniser and others, a constitutional arsonist.<br>With Brexit left unresolved, Bercow is determ...