Scale 1 : 20000. North up.
This map comes from the Draft Map of Registered Common Land & Open Country, created by the Countryside Agency in 2003. Notes on the printed copy say that more information can be found at www.countryside.gov.uk/access/mapping or by calling their helpline 0845 100 3298.
See also the OCC Oxfordshire Local View pages, specifically the "on the map" tab with Map Layers for displaying various boundaries (Parish, District, County, Parliamentary), Post Code Units and much else.
Outline map below is from the 2001 census site
It also appears that the Church of England Harwell Parish boundary matches the civic boundary, so this map also reflects the Parish boundary.
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