PPS 6 Planning Archaeology and the Built Heritage·Page 20·3.20
Discovery of Previously Unknown Archaeological Remains - Material Change
Discovery of previously unknown archaeological remains may represent a material change affecting what development is permitted in a settlement or countryside area.
Archaeological research continues and new and exciting discoveries are made. The discovery of archaeological remains, which have not been previously known, may therefore represent a material change which can affect the nature of development which will be permitted in respect of an area within a settlement, or in the countryside.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/PPS 6 - Planning Archaeology and the Built Heritage.pdf