Luckily for the Parliamentarians, Skippon saw this opening and ordered two regiments of the London Trained Bands to close the gap. Although they succeeded in bridging the gap between the two wings of Essex's force, there was no cover, and a Royalist battery of eight heavy guns drawn up on high ground began firing on them. Unable to move because of the necessity of their position, they were left enduring close-range fire "when men's bowels and brains flew in faces", resisting two attacks by Royalist cavalry and infantry led by Jacob Astley. Historian John Day notes that records show most Trained Band casualties were hit in the head, while a survivor boasted that the artillery "did us no harm, only the shot broke our pikes"; evidently, in the heat of battle, the Royalist artillery were firing too high. Despite this, the Royalist artillery fire had taken its toll, and the Trained Band regiments were forced to retreat. The Royalists pursued, and only close-quarters musket fire allowed the militia to regroup without substantial losses. After regrouping, the militia was again attacked by two regiments of foot and two of cavalry, who despite surrounding the Londoners and dragging away a cannon were unable to break them.