Silkin Test

The Silkin Test is a UK planning policy designed to control major developments which will affect areas classified as National Parks and Areas of Outstanding Natural Beauty (AONB).
The three main criteria state that -
The test was contained in Planning Policy Statement (PPS) 7: Sustainable Development in Rural Areas (formerly PPG7)
PPS7 has now been replaced by the National Planning Policy Framework (2012), in which paras. 115/116 set out a differently-worded test.
History.
The criteria were first proposed by the then Minister of Town and Country Planning, Lewis Silkin MP in 1949. 