Northampton's forces were routed utterly, and Lord Sheffield was slain, and many houses and gates were burnt in the city.
Then for three weeks longer Robert Ket remained in power, still hoping against hope that some attention would be given by the Government to his "Requests and Demands." Protector Somerset, beset by his own difficulties, could do nothing for rebellious peasants, could not countenance in any way an armed revolt, however great the miseries that provoked insurrection.
The Earl of Warwick was dispatched with 14,000 troops to end the rebellion, and arrived on August 24th.

For two days the issue seemed uncertain--half the city only was in Warwick's hands.

The arrival of 1,400 mercenaries--"lanzknechts," Germans mostly--and a fatal decision of the rebels to leave their vantage ground at Mousehold Heath and do battle in the open valley that stretched towards the city, gave complete victory to Warwick.
The peasants poured into the meadows beyond Magdalen and Pockthorpe gates, and were cut to pieces by the professional soldiers.
When all seemed over Ket galloped away to the north, but was taken, worn out, at the village of Swannington, eight miles from Norwich.
More than 400 peasants were hanged by Warwick's orders, and their bodies left to swing on Mousehold and in the city.

Robert Ket and William Ket were sent to London, and after being tried and condemned for high treason, were returned to Norwich in December for execution.

Robert Ket was hanged in chains from Norwich Castle, and William suffered in similar fashion from the parish church at Wymondham--to remind all people of the fate that befall those who venture, unsuccessfully, to take up arms against the government in power.
So the Norfolk Rising ended, and with it ended all serious popular insurrection in England.