Want to know why Henry VI's reign was such a disaster? Then look no further than his father

Henry VI fell foul of the French, his soldiers, even his own advisors. Yet, writes Lauren Johnson, his greatest enemy was the revered warrior-king who left him the throne 600 years ago

- Lauren Johnson

In Westminster Abbey, the tomb of Henry V is hard to miss. Towering above the mosaic-encrusted tomb I of St Edward the Confessor and his royal successors, for centuries Henry's final resting place was topped by a shield, helm and warhorse's saddle. All are symbols of the martial glory of a man many still consider to be the best English king of the Middle Ages.

Meanwhile, in the Lady Chapel behind, tucked away and noticed by almost no one, is a small wooden pew-end representing Henry V's successor, and only child, Henry VI. Can anything more aptly demonstrate the reputations of this father and son? Henry V loomed over his offspring from the grave, and in his father's shadow Henry VI grew up stunted, emotionally and politically.

On the 600th anniversary of his death, Henry V's triumphs are still rehearsed in productions of the eponymous Shakespeare play. His appears to be the ultimate underdog success story. Eldest son of a Lancastrian usurper, Henry V united England to claim the French throne, overcame substantial odds to win the battle of Agincourt, and was rewarded at the Treaty of Troyes in 1420, where he was named heir to the French kingdom and married Princess Catherine of Valois. Revered as "the flower in his time of Christian chivalry", he died on campaign, aged 35 in 1422, leaving a nine-month-old son who shortly after was proclaimed King Henry VI, of England and France.

Henry VI's life also gained Shakespeare's attention, but in the three plays bearing his name he is an insubstantial figure with few lines, completely overshadowed by more dynamic characters, chief among them his queen, Margaret of Anjou. Where Henry V's reign is a litany of triumphs, his son's reads like a top trumps of failure: he lost the Hundred Years' War and the Wars of the Roses, was twice imprisoned by his Yorkist rivals and died, almost certainly murdered, in the Tower of London shortly after his only child had been hacked to death in battle.