London | Prince Harry’s sub-Shakespearean soap opera – of TV interviews, a Netflix documentary and a salacious memoir – has reached fever pitch. No British pub evening or dinner party is complete without a discussion about whose side you are on in the fraternal fracas.

Behind the tabloid fodder, though, lies a serious question. Will Harry’s repeated public onslaught on his father and brother damage the standing and authority of the monarchy – and by implication its crucial constitutional position?