The South-western Growth Area proposal was for approximately 875 hectares (2,161 acres) and was to be bounded at its north-east by the southwest point of the existing built up area (West Bletchley) and at its East by the brickfields and landfill site to the south of Bletchley. The area was to be enclosed to the north by the A421 (running east to west across Milton Keynes) and at the south by the road running southwest from Water Eaton to Drayton Parslow. This would have absorbed and expanded Newton Longville in a similar way to the other villages that predate the new city. However, the Planning Inspector struck out this proposal, saying that any expansion should be constrained to the south by the disused Bletchley-Bicester railway line.