The records in this series are enclosure awards and extracts of awards, which relate to lands and rights of the Duchy of Lancaster.
The awards and extracts mainly relate to Yorkshire and Lancashire, although Buckinghamshire, Derbyshire, Leicestershire, Lincolnshire, Monmouthshire, Northamptonshire and Nottinghamshire are also represented.
There are only five complete awards in this series (DL 45/1-4 and 11). The rest of the series of made up of extracts.
Most of this series is made up of extracts, which were sent to the Duchy office by the commissioners, as specified under particular enclosure acts, or by the clerks of the peace of the county concerned. The extracts cover only the lands and rights of the Duchy. The few complete awards sometimes include a map.
DL 45/12 was added to the series in 2006.