Mercia itself is divided, with the northern…

Mercia itself is divided, with the northern part being taken by Oswiu outright and the southern part going to Penda's Christian son Peada, who has married into the Bernician royal line (although Peada will survive only until his murder in 656).

Northumbrian authority over Mercia will be overthrown within a few years, however.

Significantly, the battle of the Winwead marks the effective demise of Anglo-Saxon paganism.

Penda had continued in his traditional paganism despite the widespread conversions of Anglo-Saxon monarchs to Christianity, and a number of Christian kings had suffered death in defeat against him; after Penda's death, Mercia is converted, and all the kings who rule hereafter (including Penda's sons Peada, Wulfhere and Æthelred) are Christian.