It is catalogued as number 40618 in the Additional manuscripts collection at the British Library.
The original final page of John has been lost but was replaced by a folio written in by a 10th-century Anglo-Saxon scribe.
The Anglo-Saxon miniatures are done in an early version of the Winchester Style and were influenced by Carolingian illumination.
These were erased in the 10th century and new zoomorphic initials were repainted in an Anglo-Saxon style.
The placement of the initials is unusual because lines are rarely broken to start a new paragraph.
The text usually continues and the initial is omitted from its proper place and is instead inserted into the margin.
The manuscript is thought to have belonged to King Athelstan, who may have ordered the 10th century "modernization".