The royalists fled back to the castle and priory and the King was forced to sign the Mise of Lewes, ceding many of his powers to de Montfort.

The King rejected the negotiations, and de Montfort moved his men from Fletching to Offham Hill, a mile to the north-west of Lewes, in a night march that surprised the royalist forces.

[7][8] The barons held the higher ground overlooking Lewes and had ordered their men to wear white crosses as a distinguishing emblem.

Edward led a cavalry charge against Segrave's Londoners, placed on the left of the baronial line, that caused them to break and flee to the village of Offham.

[8][10] Henry was forced to launch an attack with his centre and right divisions straight up Offham Hill into the baronial line, which awaited them at the defensive.

However, upon locating his father, Edward was persuaded that, with the town ablaze and many of the King's supporters having fled, it was time to accept de Montfort's renewed offer of negotiations.

[8] The Earl of Cornwall was captured by the barons when he was unable to reach the safety of the priory and, being discovered in a windmill, was taunted with cries of "Come down, come down, thou wicked miller.

Though the document has not survived, it is clear that Henry was forced to accept the Provisions of Oxford, while Prince Edward remained a hostage of the barons.