The final and longest siege took place from July 1645 to March 1646, when the Royalist commander surrendered the hall to the Parliamentarians.

[3][4][5] A large earthen bank was raised over the north and north-west curtain walls to provide a defence against cannon and musket fire.

[5] The first siege caused damage to the nearby church and resulted in the loss of the drawbridge, but ended with a Parliamentarian withdrawal.

The Parliamentary forces were now in a position to effect an artillery bombardment of the buildings and, in spite Lord Newport arriving with more reinforcements,[citation needed] the Royalist commander, Sir Vincent Corbet, surrendered on 28 March 1646.

[citation needed] With the loss of High Ercall, Ludlow was the only garrison in Shropshire left in the control of the Royalists, and it fell in May of that year.